commands: use the optional badfn argument when building a matcher

scmutil: add an optional parameter to matcher factories for a bad() override Even though scmutil.matchandpats() is documented to warn about bad files, several callers silence the warning.

scmutil: use the optional badfn argument when building a matcher

context: add an optional constructor parameter for a match.bad() override Most matcher creation is done by way of a context.

match: add an optional constructor parameter for a bad() override This will be used to eliminate monkey patching of new matcher instances that weren't removed in 5984dd42e140::1a95c57959f6.

mail: pass ui to sslutil.wrapsocket() even if verifycert is off (issue4713) 21b536f01eda made 'ui' argument is passed via sslutil.sslkwargs(), but mailer doesn't call sslkwargs() if smtp.verifycert is off. So we have to put it in sslkwargs manually.

windows: use os.SEEK_END