Replace HTTP man.he.net with HTTPS man7.org manpages

[rwp0]

For Linux manual pages:

http://man.he.net/man5/crontab seems to be HTTP only, while

https://man7.org/linux/man-pages/man5/crontab.5.html is HTTPS

resolve_man_page_link , man_url_prefix, and man_url_prefix methods will need to be reworked.

=head2 man_url_prefix

In turning C<< L<crontab(5)> >> into http://whatever/man/1/crontab, what
to put before the "1/crontab". The default value is
"http://man.he.net/man".

=head2 man_url_postfix

What to put after "1/crontab" in the URL. This option is not set by default.

=head2 resolve_man_page_link

  my $url = $pod->resolve_man_page_link('crontab(5)', 'EXAMPLE CRON FILE');
  my $url = $pod->resolve_man_page_link('crontab');

Resolves a man page link target and numeric section to a URL. The resulting
link will be returned for the above examples as:

    http://man.he.net/man5/crontab
    http://man.he.net/man1/crontab

Note that the first argument is required. The section number will be parsed
from it, and if it's missing will default to 1. The second argument is
currently ignored, as L<man.he.net|http://man.he.net> does not currently
include linkable IDs or anchor names in its pages. Subclass to link to a
different man page HTTP server.

[jkeenan]

@rwp0, since you've already done the research on this issue, why don't you just convert it into a pull request?

[rwp0]

@rwp0, since you've already done the research on this issue, why don't you just convert it into a pull request?

If you're giving me a a greenlight to switch from HE to man7 globally for all the Unix manpages referenced, I can proceed with the conversion.

[jkeenan]

@rwp0, since you've already done the research on this issue, why don't you just convert it into a pull request?

If you're giving me a a greenlight to switch from HE to man7 globally for all the Unix manpages referenced, I can proceed with the conversion.

Well, I'm not a maintainer here, but I suspect that if you did the p.r. the maintainers would accept it. (No promises, though!)

[khwilliamson]

@rwp0 please submit a PR

[rwp0]

@rwp0 please submit a PR

Thanks for the confirmation, I will start working on it soon