patch: rename diffopts to diffallopts

This is meant to be used when all features are explicitly requested. diffopts
is kept as an alias for now -- it will go away soon.

mercurial/patch.py

@@ -1558,10 +1558,12 b' def changedfiles(ui, repo, patchpath, st'
 class GitDiffRequired(Exception):
     pass
 
-def diffopts(ui, opts=None, untrusted=False, section='diff'):
+def diffallopts(ui, opts=None, untrusted=False, section='diff'):
     '''return diffopts with all features supported and parsed'''
     return difffeatureopts(ui, opts=opts, untrusted=untrusted, section=section)
 
+diffopts = diffallopts
+
 def difffeatureopts(ui, opts=None, untrusted=False, section='diff'):
     '''return diffopts with only opted-in features parsed'''
     def get(key, name=None, getter=ui.configbool, forceplain=None):