Support author:self and committer:self queries

Bug: Issue 14895
Change-Id: Iba39629d4ecbff88ccbbf4a92cbb24fdfd875135
diff --git a/Documentation/user-search.txt b/Documentation/user-search.txt
index 0c1ec2d..0cf605b 100644
--- a/Documentation/user-search.txt
+++ b/Documentation/user-search.txt
@@ -555,14 +555,17 @@
 author:'AUTHOR'::
 +
 Changes where 'AUTHOR' is the author of the current patch set. 'AUTHOR' may be
-the author's exact email address, or part of the name or email address.
+the author's exact email address, or part of the name or email address. The
+special case of `author:self` will find changes authored by the caller.
 
 [[committer]]
 committer:'COMMITTER'::
 +
 Changes where 'COMMITTER' is the committer of the current patch set.
 'COMMITTER' may be the committer's exact email address, or part of the name or
-email address.
+email address. The special case of `committer:self` will find changes committed
+by the caller.
+
 
 [[submittable]]
 submittable:'SUBMIT_STATUS'::