Merge branch 'il/remote-fd-ext'

* il/remote-fd-ext:
  remote-fd/ext: finishing touches after code review
  git-remote-ext
  git-remote-fd
  Add bidirectional_transfer_loop()

Conflicts:
	compat/mingw.h

diff --cc Makefile
Simple merge

diff --cc builtin.h
Simple merge

diff --cc compat/mingw.h
Simple merge

diff --cc git.c
Simple merge