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.

sshpeer: allow write operations through double pipe We have a shiny toy, lets make it wider.

sshpeer: rename 'size' to 'data' in doublepipe We are about to add 'write' support, the argument will be either an int or a string.

mq: ban \r and \n in patch names (issue4711) This is at best crazy, and at worst will break things like the series file. Let's just stop the madness.

mq: use %r to format illegal characters instead of manually quoting This will make it easier to ban \r and \n in the next patch and still have a sensible error message.

histedit: abort rather than edit a public changeset (issue4704) This is suboptimal as the user still has to explicitly cancel the histedit afterwards, but it prevents the immediate problem. histedit should probably implicitly do 'hg histedit --abort' if a util.Abort is raised internally.

test-histedit-edit: add test that demonstrates bug in issue4704 Durham and I agree that it's a bug you can fold into a change that's not listed in the histedited set, so we'll follow this up with a change that prevents folds as the first edit step.

histedit: copyedit docstring wording problem I noticed while here

merge with stable