Conf comment fixes

Author: timvaillancourt

conf/mongodb-consistent-backup.example.conf

@@ -23,14 +23,14 @@ production:
   #    wait_secs: [1+] (default: 300)
   #    ping_secs: [1+] (default: 3)
   #oplog:
-  #  compression: [none|gzip] (default: true - if used by backup stage)
+  #  compression: [none|gzip] (default: gzip - if gzip is used by backup stage)
   #  resolver_threads: [1+]   (default: 2 per CPU)
   #  tailer:
   #    status_interval: 30
   archive:
     method: tar
   #  tar:
-  #    compression: [none|gzip] (default: gzip, none if backup is compressed)
+  #    compression: [none|gzip] (default: gzip - none if backup is already compressed)
   #    threads: [1+]            (default: 1 per CPU)
   #  zbackup:
   #    binary: [path]        (default: /usr/bin/zbackup)