add link explaining the format of the .mailmap file

diff --git a/.mailmap b/.mailmap
index 0537484..51ed9e1 100644 (file)
--- a/.mailmap
+++ b/.mailmap
@@ -2,6 +2,8 @@
 # so if someone were to legally change their name, we could use it to fix that
 # while maintaining the integrity of the repository
 
+# https://www.kernel.org/pub/software/scm/git/docs/git-shortlog.html
+
 Alexander Hartmaier <abraxxa@cpan.org>      <alexander.hartmaier@t-systems.at>
 Amiri Barksdale <amiribarksdale@gmail.com>  <amiri@metalabel.com>
 Andrew Rodland <andrew@cleverdomain.org>    <arodland@cpan.org>