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

merge with stable

crecord: fix three typos introduced while moving crecord into core When moving crecord to core, I did a search an replace to remove all of the variable with caps letter. Doing so, I unfortunately changed some commands with capital letter shortcut to their lowercase counterpart. I fixed one of these cases in 093d38165e5a. This patch fixes all of the remaining cases.

revlog: move size limit check to addrevision This lets us add the name of the indexfile to the message.

sshpeer: also use doublepipe for client to server communication This will allow even more real time output when the server issue output in the middle a stream push.

sshpeer: allow doublepipe on unbuffered main pipe The output pipe does not have manually managed read buffer (actually, no read anything). To also use the doublepipe for outgoing write (useful to consume remote output when pushing large set of data) we need the doublepipe to work on standard pipe too.