setup.c: detect $GIT_COMMON_DIR in is_git_directory()

diff --git a/Documentation/git-remote-ext.txt b/Documentation/git-remote-ext.txt
index cd0bb77e4a07453c54378b8f2db813ba354a68ef..b25d0b5996b560837648c13c742bfc5ad09f0310 100644 (file)
--- a/Documentation/git-remote-ext.txt
+++ b/Documentation/git-remote-ext.txt
@@ -116,6 +116,10 @@ begins with `ext::`.  Examples:
        determined by the helper using environment variables (see
        above).
 
+SEE ALSO
+--------
+linkgit:gitremote-helpers[1]
+
 GIT
 ---
 Part of the linkgit:git[1] suite