Re: [PATCH v7 0/3] Improve checks for valid_fqdn in send-email and update documentation

> Hi all
>
> This series of patches mainly has two changes:
>
> 1. Improve the checks for valid_fqdn in send-email to be more strict and
>    compliant with RFC1035.
> 2. Update the documentation for send-email to include examples of using
>    OAuth2.0 with Gmail and Outlook, as well as links to the credential
>    helpers for these services.
>
> P.S. I have used `git-credential-outlook` linked in the second and third
> patch for this email!
>
> v2: - Improve grammar and add missing "" in second patch.
>     - Separate footnotes and the trailer block with a blank line in the first
>       patch.
>
> v3: - Change link for email helpers since old one was too long.
>
> v4: - Improve log message of first and second patch.
>     - Update valid_fqdn check in first patch to allow one or more <upto 63
>       octet run of alnum or hyphen that does not begin or end with hyphen>,
>       separated by a single dot in between each.
>     - Revert the documentation regarding sending patches to a mailing list
>       in the second patch.
>
> v5: - Simplify the regex in the first patch to check for valid FQDN.
>     - Fix formatting in the second patch to make it more readable.
>
> v6: - Use backticks for ~/.gitconfig in the second patch.
>
> v7: - Clarify the use of `OAUTHBEARER` and `XOAUTH2` in the second patch.