Add comment about cvs branch numbers.

diff --git a/src/tools/pgcvslog b/src/tools/pgcvslog
index eb7d9b2cfbf10648e47eb07abbfc94826422216b..6a5a4bc18e62e521e7842888306b5209549eef43 100755 (executable)
--- a/src/tools/pgcvslog
+++ b/src/tools/pgcvslog
@@ -129,6 +129,7 @@ awk '       BEGIN   {html="'"$HTML"'"; lineno = 0;}
        # mark back branches
        $1 == "revision" \
        {
+               # back branches have +2 periods in revision number
                if ($2 ~ /\..*\./)
                        back_branch=" <branch>"
                else    back_branch = ""