[PATCH v2 0/2] docs: update email credential helpers

Hi all,

This patch series included two patches:

1. The first patch adds a link to the `git-credential-yahoo` helper for
   Yahoo accounts and links Google's `sendgmail` tool as an alternative
   method for sending emails through Gmail.

2. The second patch removed the email credential helper links from the
   `gitcredentials` page. The links are still available in the
   `git-send-email` documentation, which is the right place for them.

Detailed explanation of the changes has been done in individual patch.

v2: Removed instructions for Yahoo SMTP server since I've realised that
    Yahoo *was* a popular email service. Also, the instructions were
    just making the docs more crowded. I've also added a link to
    Google's `sendgmail` tool in the first patch. The second patch has been
    added to address the issues that came up here:
    https://github.com/git/git-scm.com/pull/2005

Aditya Garg (2):
  docs: add credential helper for yahoo and link Google's sendgmail tool
  docs: remove credential helper links for emails from gitcredentials

 Documentation/git-send-email.adoc | 10 ++++++++--
 Documentation/gitcredentials.adoc |  4 ----
 2 files changed, 8 insertions(+), 6 deletions(-)