killdaemons: prevent killing all user processes by bad pid file When I was fixing the test-gpg issue, I noticed gpg-connect-agent could print "-1" as a server pid if command was wrong. I'm not pretty sure but nobody would want to kill their running applications by mistake.

py3: automatically glob out line numbers from check-py3-compat output It was boring task to update the result manually.

py3: have check-py3-compat require pygments to get stable result

computeoutgoing: move the function from 'changegroup' to 'exchange' Now that all users are in exchange, we can safely move the code in the 'exchange' module. This function is really about processing the argument of a 'getbundle' call, so it even makes senses to do so.

getchangegroup: take an 'outgoing' object as argument (API) There is various version of this function that differ mostly by the way they define the bundled set. The flexibility is now available in the outgoing object itself so we move the complexity into the caller themself. This will allow use to remove a good share of the similar function to obtains a changegroup in the 'changegroup.py' module. An important side effect is that we stop calling 'computeoutgoing' in 'getchangegroup'. This is fine as code that needs such argument processing is actually going through the 'exchange' module which already all this function itself.

outgoing: add a 'missingroots' argument This argument can be used instead of 'commonheads' to determine the 'outgoing' set. We remove the outgoingbetween function as its role can now be handled by 'outgoing' itself. I've thought of using an external function instead of making the constructor more complicated. However, there is low hanging fruit to improve the current code flow by storing some side products of the processing of 'missingroots'. So in my opinion it make senses to add all this to the class.