Merge branch 'rv/sendemail-tocmd-in-config-and-completion'

Teach "sendemail.tocmd" to places that know about "sendemail.to",
like documentation and shell completion (in contrib/).

* rv/sendemail-tocmd-in-config-and-completion:
  completion: add git config sendemail.tocmd
  Documentation/config: add sendemail.tocmd to list preceding "See git-send-email(1)"

Documentation/config.txt

@@ -3007,6 +3007,7 @@ sendemail.smtpPass::
 sendemail.suppresscc::
 sendemail.suppressFrom::
 sendemail.to::
+sendemail.tocmd::
 sendemail.smtpDomain::
 sendemail.smtpServer::
 sendemail.smtpServerPort::

contrib/completion/git-completion.bash

@@ -2641,6 +2641,7 @@ _git_config ()
 		sendemail.suppressfrom
 		sendemail.thread
 		sendemail.to
+		sendemail.tocmd
 		sendemail.validate
 		sendemail.smtpbatchsize
 		sendemail.smtprelogindelay