filesystems: add new category for file systems and related utilities

The filesystems category houses file systems and file system utilities.
It is added mainly to turn the sysutils/fusefs-* pseudo-category into
a proper one, but is also useful for the sundry of other file systems
related ports found in the tree.

Ports that seem like they belong there are moved to the new category.
Two ports, sysutils/fusefs-funionfs and sysutils/fusefs-fusepak are
not moved as they currently don't fetch and don't have TIMESTAMP set
in their distinfo, but that is required to be able to push a rename
of the port by the pre-receive hook.

Approved by:	portmgr (rene)
Reviewed by:	mat
Pull Request:	https://github.com/freebsd/freebsd-ports/pull/302
PR:		281988

Mk/**ruby.mk: Switch from USE_RUBY=yes to USES=ruby

Switch from Mk/bsd.ruby.mk to Mk/Uses/ruby.mk

Notable changes are.

- Mk/bsd.ruby.mk is moved to Mk/Uses/ruby.mk.
- USE_RUBY=yes is replaced with USES=ruby.
- USE_RUBY_EXTCONF is replaced with USES=ruby:extconf.
- USE_RUBY_RDOC is replaced with USES=ruby:rdoc.
- USE_RUBY_SETUP is replaces with USES=ruby:setup.
- RUBY_NO_BUILD_DEPENDS and RUBY_NO_RUN_DEPENDS are replaced with
  USES=ruby:{build,none,run}.
- RUBY_REQUIRE isn't used anywhere, so removed.
- USES=gem now implies USES=ruby.

This is mainly the work of yasu@ at https://reviews.freebsd.org/D27863

I have just made some cosmetic changes and ran exp-run to test that the
tree is not in a BROKEN state.

Approved by:	portmgr
Differential Revision:	https://reviews.freebsd.org/D37925

Remove WWW entries moved into port Makefiles

Commit b7f05445c00f has added WWW entries to port Makefiles based on
WWW: lines in pkg-descr files.

This commit removes the WWW: lines of moved-over URLs from these
pkg-descr files.

Approved by:		portmgr (tcberner)

Add WWW entries to port Makefiles

It has been common practice to have one or more URLs at the end of the
ports' pkg-descr files, one per line and prefixed with "WWW:". These
URLs should point at a project website or other relevant resources.

Access to these URLs required processing of the pkg-descr files, and
they have often become stale over time. If more than one such URL was
present in a pkg-descr file, only the first one was tarnsfered into
the port INDEX, but for many ports only the last line did contain the
port specific URL to further information.

There have been several proposals to make a project URL available as
a macro in the ports' Makefiles, over time.

sysutils/rubygem-winrm-fs: Update to 1.3.5

Changes:	https://github.com/WinRb/winrm-fs/blob/master/changelog.md

One more small cleanup, forgotten yesterday.
Reported by:	lwhsu

Remove # $FreeBSD$ from Makefiles.

Update to 1.3.4 to be able to work with rubygem-rubyzip update which is required
for gitlab security update.

MFH:		2020Q1

Update version requirement of RUN_DEPENDS

Update to 1.3.1

Changes:	https://github.com/WinRb/winrm-fs/blob/master/changelog.md

Update to 1.3.0

Changes:	https://github.com/WinRb/winrm-fs/blob/master/changelog.md

Update to 1.2.1

Changes:	https://github.com/WinRb/winrm-fs/blob/master/changelog.md

Update to 1.2.0

Changes:	https://github.com/WinRb/winrm-fs/blob/master/changelog.md

Update to 1.1.1

Changes:	https://github.com/WinRb/winrm-fs/blob/master/changelog.md

Update to 1.1.0

Changes:	https://github.com/WinRb/winrm-fs/blob/master/changelog.md

Update to 1.0.2

Changes:	https://github.com/WinRb/winrm-fs/blob/master/changelog.md

sysutils/rubygem-winrm-fs: update to 1.0.1

PR:		217944

Update to 0.3.2

Changes:	https://github.com/WinRb/winrm-fs/blob/master/changelog.md

sysutils/rubygem-winrm-fs: patch to work with newer rubygem-logging

sysutils/rubygem-winrm-fs: update to 0.3.0

Convert USES=gem:autoplist to USES=gem since autoplist is default

create USES=gem and update rubygem- ports to use it

Note that for now ports still have to have USE_RUBY=yes to use USES=gem

PR:		209041
Differential Revision:	https://reviews.freebsd.org/D6070

Remove ${PORTSDIR}/ from dependencies, categories r, s, t, and u.

With hat:	portmgr
Sponsored by:	Absolight

- Update to 0.2.3

Changes:	https://github.com/WinRb/winrm-fs/blob/master/changelog.md

- Update to 0.2.2

Changes:	https://github.com/WinRb/winrm-fs/blob/master/changelog.md

- Update to 0.2.1

Changes:	https://github.com/WinRb/winrm-fs/blob/master/changelog.md

new port: sysutils/rubygem-winrm-fs

Ruby library for file system operations via Windows Remote Management

WWW: https://github.com/WinRb/winrm-fs

Approved by:	swills (mentor)
Differential Revision:	https://reviews.freebsd.org/D3082