Merge branch 'mn/send-email-works-with-credential'

Hooks the credential system to send-email.

* mn/send-email-works-with-credential:
git-send-email: use git credential to obtain password
Git.pm: add interface for git credential command
Git.pm: allow pipes to be closed prior to calling command_close_bidi_pipe
Git.pm: refactor command_close_bidi_pipe to use _cmd_close
Git.pm: fix example in command_close_bidi_pipe documentation
Git.pm: allow command_close_bidi_pipe to be called as method

diff --cc perl/Git.pm
index 57a17160f9decb7879b8d6cba741ddb6d593be47,377f7bafb779aeb7228419048d3f746179eda841..96cac39a4c8ebc0ce4e111271429fdf68b03bf97
--- 1/perl/Git.pm
--- 2/perl/Git.pm
+++ b/perl/Git.pm
@@@ -59,7 -59,7 +59,8 @@@ require Exporter
                  command_bidi_pipe command_close_bidi_pipe
                  version exec_path html_path hash_object git_cmd_try
                  remote_refs prompt
 +                get_tz_offset
+                 credential credential_read credential_write
                  temp_acquire temp_release temp_reset temp_path);