test-url: skip test when ssl module is unavailable

revset: use 'requires' instead of 'wants' in error message

outgoing: unify common graphlog.outgoing and hg.outgoing code

bundlerepo: unify common code into a new getremotechanges The pattern where we fetch incoming remote changes and return them as a local bundlerepo seems common. It's nicer to have this code unified.

revset id(): fix error text to say "id wants..." instead of "rev wants..."

keyword: only use expensive fctx.cmp when needed Restrict expensive cmp to cases when: - comparing against working directory and - encode filters active or - path is configured for keyword expansion

context: narrow down filter special case in filectx.cmp() cmp via filelog when encode filters are present, but only when actually comparing to the working directory.

incoming: unify code for incoming and graphlog.incoming

incoming: rename variable Groundwork so that incoming and graphlog.incoming code look the same and get easier to unify.

import: only the first hg patch marker should be processed (issue2417) Proper use of the hgpatch state variable had been lost in the final edits of d7452292f9d3 - now it works more like intended.