wrapfunction: use sysstr instead of bytes as argument in "zeroconf"

This is as valid and simpler, it will help us to eventually get ride of
`safehasattr`.

hgext/zeroconf/__init__.py

@@ -233,10 +233,10 b' def cleanupafterdispatch(orig, ui, optio'
             server.close()
 
 
-extensions.wrapfunction(dispatch, b'_runcommand', cleanupafterdispatch)
+extensions.wrapfunction(dispatch, '_runcommand', cleanupafterdispatch)
 
-extensions.wrapfunction(uimod.ui, b'config', config)
-extensions.wrapfunction(uimod.ui, b'configitems', configitems)
-extensions.wrapfunction(uimod.ui, b'configsuboptions', configsuboptions)
-extensions.wrapfunction(hg, b'defaultdest', defaultdest)
-extensions.wrapfunction(servermod, b'create_server', zc_create_server)
+extensions.wrapfunction(uimod.ui, 'config', config)
+extensions.wrapfunction(uimod.ui, 'configitems', configitems)
+extensions.wrapfunction(uimod.ui, 'configsuboptions', configsuboptions)
+extensions.wrapfunction(hg, 'defaultdest', defaultdest)
+extensions.wrapfunction(servermod, 'create_server', zc_create_server)