Merge branch 'db/remote'

* db/remote:
Move refspec pattern matching to match_refs().
Update local tracking refs when pushing
Add handlers for fetch-side configuration of remotes.
Move refspec parser from connect.c and cache.h to remote.{c,h}
Move remote parsing into a library file out of builtin-push.

diff --cc Makefile
Simple merge

diff --cc cache.h
Simple merge

diff --cc connect.c
Simple merge