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)"
sendemail.suppresscc::
sendemail.suppressFrom::
sendemail.to::
+sendemail.tocmd::
sendemail.smtpDomain::
sendemail.smtpServer::
sendemail.smtpServerPort::
sendemail.suppressfrom
sendemail.thread
sendemail.to
+ sendemail.tocmd
sendemail.validate
sendemail.smtpbatchsize
sendemail.smtprelogindelay