…tor.

On MacOS, it seems that fribidi.h isn't in its own subfolder of
fribidi/ -- therefore, elide this if the compiling host is MacOS.

Noticed by AlaricToo on #fvwm IRC.

This adds an option to run an fvwm command in the context of all
windows rearranged by FvwmRearrange. This was added to allow setting
the state of all windows via `-win_cmd "State n"` to allow matching
them with conditionals. A general option was added to allow users to
run any fvwm command in all window's context.

The status of the release needs to be kept, but it can no
longer be a part of ./configure as that is being removed.

autotools has now been replaced with meson.

Original rationale is here:  #1068

A massive thanks to Kangie (Matt Jolly) for all his hard work in making
this happen!

Rewrite the release process such that releases can be fully automated.

This is mostly relevant for release tarballs, but developer
documentation doesn't get shipped in a release.  However, installation
instructions are still required.

Therefore, make the INSTALL.md file part of the root of the project.

Fixes #1194

The need for go-1.14 was only needed for autotools, so this check can be
removed.

Additionally, go-1.14 was released over five years ago so the chances
are a newer version is likely ubiquitous.

FvwmPager would crash if `WindowFont` was set then later
set to `None`. This makes sure that if `WindowFont None`
is used, the font is set back to Null for fallback checks.

This also clarifies the `Balloon type` option. This option
no longer accepts NULL inputs, use All as an example to
show balloon windows everywhere, and state default is None.

* set -e for the worse case
* POSIX check on source

We can't just check for `locale_charset` as some (very silly)
distributions ship, or allow end users to install, GNU libiconv
on GNU libc systems.

- Move `HAVE_CODESET` and `HAVE_LIBCHARSET` checks into `iconv` dep
  conditional
- perform link test against libcharset to see if it is usable
- add a visible warning that GNU libiconv should not be installed on a
  GNU libc system, if libcharset (libiconv) linking fails due to apparent
  conflicts with glibc iconv.

See Also: #1186
Signed-off-by: Matt Jolly <kangie@gentoo.org>

When a monitor is marked as changed, recalculate the panframes as these
could now be in different coordinates.

When reacting a screen change, ensure we run the set of actions at least
once.

Mark the monitor as found before marking it as changed so that it makes
it easier to differentiate the two conditions.

When updating the visible_name or icon_name of a window, don't miss
anything.

Fixes #1202