doc: keep first level section header in upper case

When formatted as a man page, 1st section header is always in upper
case even if we write it otherwise. Make all 1st section headers
uppercase to keep it close to the final output.

This does affect html since case is kept there, but I still think it's
a good idea to maintain a consistent style for 1st section headers.

Some sections perhaps should become second sections instead, where
case is kept, and for better organization. I will update if anyone has
suggestions about this.

While at there I also make some header more consistent (e.g. examples
vs example) and fix a couple minor things here and there.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Author: pclouds

Documentation/git-add.txt

@@ -193,7 +193,7 @@ for "git add --no-all <pathspec>...", i.e. ignored removed files.
 	for command-line options).
 
 
-Configuration
+CONFIGURATION
 -------------
 
 The optional configuration variable `core.excludesFile` indicates a path to a
@@ -226,7 +226,7 @@ Because this example lets the shell expand the asterisk (i.e. you are
 listing the files explicitly), it does not consider
 `subdir/git-foo.sh`.
 
-Interactive mode
+INTERACTIVE MODE
 ----------------
 When the command enters the interactive mode, it shows the
 output of the 'status' subcommand, and then goes into its

Documentation/git-apply.txt

@@ -240,7 +240,7 @@ When `git apply` is used as a "better GNU patch", the user can pass
 the `--unsafe-paths` option to override this safety check.  This option
 has no effect when `--index` or `--cached` is in use.
 
-Configuration
+CONFIGURATION
 -------------
 
 apply.ignoreWhitespace::
@@ -251,7 +251,7 @@ apply.whitespace::
 	When no `--whitespace` flag is given from the command
 	line, this configuration item is used as the default.
 
-Submodules
+SUBMODULES
 ----------
 If the patch contains any changes to submodules then 'git apply'
 treats these changes as follows.

Documentation/git-branch.txt

@@ -287,7 +287,7 @@ CONFIGURATION
 `--list` is used or implied. The default is to use a pager.
 See linkgit:git-config[1].
 
-Examples
+EXAMPLES
 --------
 
 Start development from a known tag::
@@ -318,7 +318,7 @@ See linkgit:git-fetch[1].
 is currently checked out) does not have all commits from the test branch.
 
 
-Notes
+NOTES
 -----
 
 If you are creating a branch that you want to checkout immediately, it is

Documentation/git-bundle.txt

@@ -92,8 +92,8 @@ It is okay to err on the side of caution, causing the bundle file
 to contain objects already in the destination, as these are ignored
 when unpacking at the destination.
 
-EXAMPLE
--------
+EXAMPLES
+--------
 
 Assume you want to transfer the history from a repository R1 on machine A
 to another repository R2 on machine B.

Documentation/git-clone.txt

@@ -273,7 +273,7 @@ or `--mirror` is given)
 :git-clone: 1
 include::urls.txt[]
 
-Examples
+EXAMPLES
 --------
 
 * Clone from upstream:

Documentation/git-cvsserver.txt

@@ -207,7 +207,7 @@ allowing access over SSH.
 ------
 
 [[dbbackend]]
-Database Backend
+DATABASE BACKEND
 ----------------
 
 'git-cvsserver' uses one database per Git head (i.e. CVS module) to
@@ -321,7 +321,7 @@ git-cvsserver, as described above.
 When these environment variables are set, the corresponding
 command-line arguments may not be used.
 
-Eclipse CVS Client Notes
+ECLIPSE CVS CLIENT NOTES
 ------------------------
 
 To get a checkout with the Eclipse CVS client:
@@ -346,15 +346,15 @@ offer. In that case CVS_SERVER is ignored, and you will have to replace
 the cvs utility on the server with 'git-cvsserver' or manipulate your `.bashrc`
 so that calling 'cvs' effectively calls 'git-cvsserver'.
 
-Clients known to work
+CLIENTS KNOWN TO WORK
 ---------------------
 
 - CVS 1.12.9 on Debian
 - CVS 1.11.17 on MacOSX (from Fink package)
 - Eclipse 3.0, 3.1.2 on MacOSX (see Eclipse CVS Client Notes)
 - TortoiseCVS
 
-Operations supported
+OPERATIONS SUPPORTED
 --------------------
 
 All the operations required for normal use are supported, including
@@ -424,7 +424,7 @@ For best consistency with 'cvs', it is probably best to override the
 defaults by setting `gitcvs.usecrlfattr` to true,
 and `gitcvs.allBinary` to "guess".
 
-Dependencies
+DEPENDENCIES
 ------------
 'git-cvsserver' depends on DBD::SQLite.
 

Documentation/git-diff-index.txt

@@ -37,14 +37,14 @@ include::diff-options.txt[]
 
 include::diff-format.txt[]
 
-Operating Modes
+OPERATING MODES
 ---------------
 You can choose whether you want to trust the index file entirely
 (using the `--cached` flag) or ask the diff logic to show any files
 that don't match the stat state as being "tentatively changed".  Both
 of these operations are very useful indeed.
 
-Cached Mode
+CACHED MODE
 -----------
 If `--cached` is specified, it allows you to ask:
 
@@ -77,7 +77,7 @@ So doing a `git diff-index --cached` is basically very useful when you are
 asking yourself "what have I already marked for being committed, and
 what's the difference to a previous tree".
 
-Non-cached Mode
+NON-CACHED MODE
 ---------------
 The "non-cached" mode takes a different approach, and is potentially
 the more useful of the two in that what it does can't be emulated with

Documentation/git-diff-tree.txt

@@ -116,7 +116,7 @@ include::pretty-options.txt[]
 include::pretty-formats.txt[]
 
 
-Limiting Output
+LIMITING OUTPUT
 ---------------
 If you're only interested in differences in a subset of files, for
 example some architecture-specific files, you might do:

Documentation/git-fast-export.txt

@@ -202,7 +202,7 @@ smaller output, and it is usually easy to quickly confirm that there is
 no private data in the stream.
 
 
-Limitations
+LIMITATIONS
 -----------
 
 Since 'git fast-import' cannot tag trees, you will not be

Documentation/git-fast-import.txt

@@ -139,7 +139,7 @@ Performance and Compression Tuning
 fastimport.unpackLimit::
 	See linkgit:git-config[1]
 
-Performance
+PERFORMANCE
 -----------
 The design of fast-import allows it to import large projects in a minimum
 amount of memory usage and processing time.  Assuming the frontend
@@ -155,7 +155,7 @@ faster if the source data is stored on a different drive than the
 destination Git repository (due to less IO contention).
 
 
-Development Cost
+DEVELOPMENT COST
 ----------------
 A typical frontend for fast-import tends to weigh in at approximately 200
 lines of Perl/Python/Ruby code.  Most developers have been able to
@@ -165,7 +165,7 @@ an ideal situation, given that most conversion tools are throw-away
 (use once, and never look back).
 
 
-Parallel Operation
+PARALLEL OPERATION
 ------------------
 Like 'git push' or 'git fetch', imports handled by fast-import are safe to
 run alongside parallel `git repack -a -d` or `git gc` invocations,
@@ -186,7 +186,7 @@ this only be used on an otherwise quiet repository.  Using --force
 is not necessary for an initial import into an empty repository.
 
 
-Technical Discussion
+TECHNICAL DISCUSSION
 --------------------
 fast-import tracks a set of branches in memory.  Any branch can be created
 or modified at any point during the import process by sending a
@@ -204,7 +204,7 @@ directory also allows fast-import to run very quickly, as it does not
 need to perform any costly file update operations when switching
 between branches.
 
-Input Format
+INPUT FORMAT
 ------------
 With the exception of raw file data (which Git does not interpret)
 the fast-import input format is text (ASCII) based.  This text based
@@ -1131,7 +1131,7 @@ If the `--done` command-line option or `feature done` command is
 in use, the `done` command is mandatory and marks the end of the
 stream.
 
-Responses To Commands
+RESPONSES TO COMMANDS
 ---------------------
 New objects written by fast-import are not available immediately.
 Most fast-import commands have no visible effect until the next
@@ -1160,7 +1160,7 @@ To avoid deadlock, such frontends must completely consume any
 pending output from `progress`, `ls`, `get-mark`, and `cat-blob` before
 performing writes to fast-import that might block.
 
-Crash Reports
+CRASH REPORTS
 -------------
 If fast-import is supplied invalid input it will terminate with a
 non-zero exit status and create a crash report in the top level of
@@ -1247,7 +1247,7 @@ An example crash:
 	END OF CRASH REPORT
 ====
 
-Tips and Tricks
+TIPS AND TRICKS
 ---------------
 The following tips and tricks have been collected from various
 users of fast-import, and are offered here as suggestions.
@@ -1349,7 +1349,7 @@ Your users will feel better knowing how much of the data stream
 has been processed.
 
 
-Packfile Optimization
+PACKFILE OPTIMIZATION
 ---------------------
 When packing a blob fast-import always attempts to deltify against the last
 blob written.  Unless specifically arranged for by the frontend,
@@ -1380,7 +1380,7 @@ to force recomputation of all deltas can significantly reduce the
 final packfile size (30-50% smaller can be quite typical).
 
 
-Memory Utilization
+MEMORY UTILIZATION
 ------------------
 There are a number of factors which affect how much memory fast-import
 requires to perform an import.  Like critical sections of core
@@ -1458,7 +1458,7 @@ and lazy loading of subtrees, allows fast-import to efficiently import
 projects with 2,000+ branches and 45,114+ files in a very limited
 memory footprint (less than 2.7 MiB per active branch).
 
-Signals
+SIGNALS
 -------
 Sending *SIGUSR1* to the 'git fast-import' process ends the current
 packfile early, simulating a `checkpoint` command.  The impatient