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

sysutils/vzvol: Move man pages to share/man

Approved by:	portmgr (blanket)

sysutils/vzvol: depend on `sysutils/e2fsprogs-core', fix formatting

Chase commit 14e733a6bb4b and depend on the new port origin.  While
here, remove excessive horizontal whitespace within the Makefile.

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.

*/*: fix trailing whitespace in pkg-descr's

Approved by:	portmgr blanket

devel/e2fsprogs-libss: merge to sysutils/e2fsprogs

This is to break dependency cycles between e2fsprogs-libss and
e2fsprogs (see 254751 comment #18 for details), and to avoid creating
yet another split-out port, then for e2fsprogs's libcom_err.

Bump PORTREVISION of the four e2fsprogs consumers to flush out
their e2fsprogs-libss dependency records.

PR:		254751
Reported by:	Felix Palmen
PR:		261217
Reported by:	tech-lists@zyxst.net
Fixes:		8e6ae60 devel/e2fsprogs-libss: use local compile_et...

Approved by:	prior maintainer timeout (Ben Kaduk, 7 months) on 254751

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

Remove # $FreeBSD$ from Makefiles.

Fix Qt5 symbol version scripts to put the catch-all clause first.  When
a symbol matches multiple clauses the last one takes precedence.  If the
catch-all is last it captures everything.  In the case of Qt5 libraries
this caused all symbols to have a Qt_5 label while some should have
Qt_5_PRIVATE_API.  This only affects lld because GNU ld always gives the
catch-all lowest priority.

Older versions of Qt5Webengine exported some memory allocation symbols from
the bundled Chromium.  Version 5.9 stopped exporting these [1] but the
symbols were kept as weak wrappers for the standard allocation functions to
maintain binary compatibility. [2][3]  The problem is that the call to the
standard function in these weak wrappers is only resolved to the standard
function if there's a call to this standard function in other parts of
Qt5Webengine, because only then is there a non-weak symbol that takes
precedence over the weak one.  If there's no such non-weak symbol the call

sysutils/vzvol: update 0.6.4 -> 0.7.0

PR:		228832
Submitted by:	rainbow@sanitylinux.org (maintainer)
Reviewed by:	krion, pi
Relnotes:	https://github.com/RainbowHackerHorse/vzvol/releases
Differential Revision:	https://reviews.freebsd.org/D15707

sysutils/vzvol: fix typo in pkg-descr

Approved by:	tcberner (mentor)
Differential Revision:	https://reviews.freebsd.org/D15740

Update to 0.6.4

PR:		228766
Submitted by:	maintainer

sysutils/vzvol: Update to 0.6.1

Differential Revision:	https://reviews.freebsd.org/D14086
Submitted by:	Rainbow <rainbow at sanitylinux.org> (maintainer)

sysutils/vzvol: update to 0.6.0

Submitted by:	rainbow@purlinux.org (maintainer)
Differential Revision:		https://reviews.freebsd.org/D13994

sysutils/vzvol: Fix wrong dependency (from virtualbox-ose port) to fix the build

PR:		225043
Submitted by:	Philip Jocks <freebsdbugs@filis.org>
Reported by:	Philip Jocks <freebsdbugs@filis.org>
Approved by:	Rainbow <rainbow@purlinux.org> (maintainer)
Sponsored by:	Netzkommune GmbH

sysutils/vzvol: fix name of VirtualBox executable.

New port: sysutils/vzvol: Feature-rich ZFS zvol management tool

vzvol is a zvol manager, that allows a user to create,
format, and manage zvols in the context of use for
virualization. It is meant to simplify the management of
these devices, as well as allow the creation of a shim
.VMDK file to allow the use of a zvol with VirtualBox.

WWW: https://github.com/RainbowHackerHorse/vzvol

PR:		224662
Submitted by:	Samantha "Rainbow" Smith <rainbow@purlinux.org>
Reviewed by:	yuri