Fix typo in sphinx manpage output

Some versions of the sphinx manpage writer have a typo in the name
'reStructuredText' written into the comments.  Add a sed command to
fix this.

(cherry picked from commit 4d30cc5d0838f6b5b3873046b0dfe72df2bdad11)

ticket: 7817
version_fixed: 1.12.1
status: resolved
Remove mentions of krb5-send-pr

Start the process of deprecating krb5-send-pr.  In practice, it causes
frustration for some users, and free-form email is good enough for
most bug reports.

Continue to install krb5-send-pr for now, but plan to remove it from
the tree in the future, probably replaced by a script that instructs
the user to send email manually.

(cherry picked from commit e972ce069dd45aad74e4f4853570ab27cfea05c2)

ticket: 5566
version_fixed: 1.12.1
status: resolved