www/mod_realdoc: update to 20170405 and takeover maintainership

[ultima]

Summary

• Updated to 20170405
• New maintainer Jov <[e-mail]>
• Added license, MIT
• Remove MASTER_SITES, not required
• Sorted USE_*, Add the USE_* then related variables close together right after it.(13.1.7)[1]

[1] https://www.freebsd.org/doc/en/books/porters-handbook/porting-samplem.html#porting-samplem-order

PR\: 220552
Sumitted by\: Jov <[e-mail]> (maintainer)
Reviewed by\: lifanov (mentor), matthew (mentor)
Approved by\: lifanov (mentor), matthew (mentor)
Differential Revision\: https://reviews.freebsd.org/DXXXXX

Test Plan

portlint:
WARN: Makefile: for new port, make $FreeBSD$ tag in comment section empty, to make SVN happy.
0 fatal errors and 1 warning found.

poudriere:
103i386
103amd64
110i386
110amd64
12i386
12amd64

[lifanov]

Looks great!