Merge pull request #6588 from bwbarrett/v3.1.x-release

dist: Rotate branch to 3.1.5

Author: bwbarrett

NEWS

@@ -55,6 +55,9 @@ included in the vX.Y.Z section and be denoted as:
    (** also appeared: A.B.C)  -- indicating that this item was previously
                                  included in release version vA.B.C.
 
+3.1.5 -- October, 2019
+----------------------
+
 3.1.4 -- April, 2019
 --------------------
 

VERSION

@@ -17,7 +17,7 @@
 
 major=3
 minor=1
-release=4
+release=5
 
 # greek is generally used for alpha or beta release tags.  If it is
 # non-empty, it will be appended to the version number.  It does not
@@ -26,7 +26,7 @@ release=4
 # requirement is that it must be entirely printable ASCII characters
 # and have no white space.
 
-greek=rc2
+greek=a1
 
 # If repo_rev is empty, then the repository version number will be
 # obtained during "make dist" via the "git describe --tags --always"