www/hiawatha: update to 9.7

[xmj]

Summary

Upgrade to 9.7.

While there,
kill PORTREVISION, deprecate @dirrmtry, kill an unused MASTER_SITE and
deprecated DISTFILES (due to DISTNAME defaulting to it, anyway.)

www/hiawatha: update to 9.7

- Update to 9.7

Changelog:

hiawatha (9.7) stable; urgency=low •UseToolkit now possible in .hiawatha file
at root of website.
 •Method option added to URL Toolkit.
 •SetResourceLimit option added.
 •ThreadKillRate option added.
 •Improved SQL injection detection.
 •Default value for DHsize set to 2048.
 •PolarSSL updated to version 1.3.8.
 •Memory allocation debugger module added.
 •Small bugfixes and improvements.
 •Bugfix: incorrect file hash printing by wigwam with directory as symlink

While there:
 - clean up portlint errors
 - rename @dirrmtry to @dir

PR:		193257
(DiffRev: placeholder)
Submitted by:	[e-mail]
Approved by:	swills (mentor)

Test Plan

http://xmj.me/freebsd/buildlogs/hiawatha-9.7.log

[swills]

Approved!

[xmj]

Committed as r370499