Merge branch 'mc/netrc-service-names' into jch

"netrc" credential helper has been improved to understand textual
service names (like smtp) in addition to the numeric port numbers
(like 25).

Comments.

* mc/netrc-service-names:
  contrib: better support symbolic port names in git-credential-netrc
  contrib: warn for invalid netrc file ports in git-credential-netrc
  contrib: use a more portable shebang for git-credential-netrc

diff --cc git-send-email.perl
Simple merge