Per discussion on IRC, and in compliance with one of the suggestions
found at http://subversion.tigris.org/issues/show_bug.cgi?id=3348#desc10,
revert the changes (r1159286, r1159299, and r1160691) which caused the
empty-string changelist name (as applied to the --changelist option)
to be specially handled.

git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1428585 13f79535-47bb-0310-9956-ffa450edef68