pushvars: add a coreconfigitem for push.pushvars.server

Differential Revision: https://phab.mercurial-scm.org/D359

mercurial/bundle2.py

@@ -1883,7 +1883,7 b' def handlehgtagsfnodes(op, inpart):'
 def bundle2getvars(op, part):
     '''unbundle a bundle2 containing shellvars on the server'''
     # An option to disable unbundling on server-side for security reasons
-    if op.ui.configbool('push', 'pushvars.server', False):
+    if op.ui.configbool('push', 'pushvars.server'):
         hookargs = {}
         for key, value in part.advisoryparams:
             key = key.upper()

mercurial/configitems.py

@@ -361,6 +361,9 b" coreconfigitem('progress', 'refresh',"
 coreconfigitem('progress', 'width',
     default=dynamicdefault,
 )
+coreconfigitem('push', 'pushvars.server',
+    default=False,
+)
 coreconfigitem('server', 'bundle1',
     default=True,
 )