Fix adding and removing files with git-style a/ b/ diffs: only skip
authortb <tb@openbsd.org>
Wed, 20 Dec 2017 21:08:06 +0000 (21:08 +0000)
committertb <tb@openbsd.org>
Wed, 20 Dec 2017 21:08:06 +0000 (21:08 +0000)
commitc01ab2b89f9bb6c3cadec364bc9c6eb1333cc34f
tree537aa15e289efc073e88611a6b9be6cb916c787f
parenta4e266465257215a66f633e011af974713e8c048
Fix adding and removing files with git-style a/ b/ diffs: only skip
six letters if they actually match "--- a/" and "+++ b/" instead of
laxer checks.

ok tom, tedu, millert
usr.bin/patch/pch.c