Merge branch 'jk/connect-service-enum' into jch

The "name" argument in git_connect() and related functions has been
converted to a "service" enum to improve type safety and clarify its
purpose.

* jk/connect-service-enum:
  transport-helper: fix typo in BUG() message
  connect: use "service" enum for "name" argument

diff --cc connect.c
Simple merge

diff --cc connect.h
Simple merge

diff --cc transport-helper.c
Simple merge

diff --cc transport.c
Simple merge

diff --cc transport.h
Simple merge