This enables the JACK output plugin on Windows, but doesn't link
against libjack64.dll, instead loads the DLL at runtime with
LoadLibrary().  This kludge avoids the extremely fragile JACK shared
memory protocol by using the system's libjack64.dll, without requiring
the same DLL at build time.

Closes https://github.com/MusicPlayerDaemon/MPD/issues/1102

Closes https://github.com/MusicPlayerDaemon/MPD/issues/1112

Exmaple -> Example

Closes https://github.com/MusicPlayerDaemon/MPD/issues/1022

Increasing the protocol version to 0.22.4 to allow clients to detect
this feature.

Closes https://github.com/MusicPlayerDaemon/MPD/issues/1038

"The documentation for mpd.conf still links to https://replaygain.org
– according to archive.org, this domain has been defunct since
2014-09-14, shortly after got domain squatted and ever since hosts
dubious content."

Closes https://github.com/MusicPlayerDaemon/MPD/issues/1050

The `{TAG} {NEEDLE}` input format documented seems to be a holdover
of pre-0.21 filters, and the commands support the new format.

Have similar information about config file in both mpd.1 ans mpd.conf.5

Update description with content from user manual [0].
Remove obsolete information regarding "required parameters" and log_level

[0] https://www.musicpd.org/doc/html/user.html#the-configuration-file

This allows users to disable the "CUE files as directories" feature
without having to disable the CUE playlist plugin completely.  This
feature has been annoying some users.

The bug https://bugzilla.samba.org/show_bug.cgi?id=11413 makes MPD
crash after at most a minute of using the plugin.  Since this bug is
five years old already and it doesn't look like it will ever be fixed,
all libsmbclient code in MPD is scheduled for removal.  For now, the
plugin is disabled by default so people are less likely to hit the
crash bug.

Closes https://github.com/MusicPlayerDaemon/MPD/issues/991

Closes https://github.com/MusicPlayerDaemon/MPD/issues/960