This should help with clients requesting window manager actions like
maximizing or minimizing. This is a first version as it only handles
messages of type WM_STATE_CHANGE and _NET_WM_STATE. But ICCCM and EWMH
know some more.

The other direction, setting of properties by the WM, is already
implemented in Rootless.c.

Fixes ArcticaProject/nx-libs#1015

Attributes GH PR #996: https://github.com/ArcticaProject/nx-libs/pull/996

Fixes ArcticaProject/nx-libs#991

Make it obvious that GetWindowProperty() and ChangeWindowProperty are
not derived from dix.

by calling the dix version after a check

remove unneccessary parentheses

make it compile again

Thanks to Simon Matter for reporting this and the patch.

Fixes ArcticaProject/nx-libs#993

Attributes GH PR #995: https://github.com/ArcticaProject/nx-libs/pull/995

Fixes ArcticaProject/nx-libs#991

Attributes GH PR #994: https://github.com/ArcticaProject/nx-libs/pull/994

Make it obvious that GetWindowProperty() and ChangeWindowProperty are
not derived from dix.

$ find . -name "*.sh" | xargs shellcheck -i SC2061

In ./roll-tarballs.sh line 159:
    find nx-X11/extras/Mesa/ -name Makefile.* | while read -r file; do rm "$file"; done
                                   ^--------^ SC2061: Quote the parameter to -name so the shell won't interpret it.

For more information:
  https://www.shellcheck.net/wiki/SC2061 -- Quote the parameter to -name so t...
Signed-off-by: Mario Trangoni <mjtrangoni@gmail.com>

See,

$ find . -name "*.sh" | xargs shellcheck -i SC2048

In ./nx-X11/lib/src/util/mkks.sh line 10:
}' $*
   ^-- SC2048: Use "$@" (with quotes) to prevent whitespace problems.

For more information:
  https://www.shellcheck.net/wiki/SC2048 -- Use "$@" (with quotes) to prevent...
Signed-off-by: Mario Trangoni <mjtrangoni@gmail.com>

See,

$ find . -name "*.sh" | xargs shellcheck -i SC2196

In ./roll-tarballs.sh line 163:
    sort "debian/patches/series" | grep -v '^#' | egrep "([0-9]+(_|-).*\.(full|full\+lite)\.patch)" | while read -r file
                                                  ^---^ SC2196: egrep is non-standard and deprecated. Use grep -E instead.

In ./roll-tarballs.sh line 200:
    sort "debian/patches/series" | grep -v '^#' | egrep "([0-9]+(_|-).*\.full\+lite\.patch)" | while read -r file
                                                  ^---^ SC2196: egrep is non-standard and deprecated. Use grep -E instead.

For more information:
  https://www.shellcheck.net/wiki/SC2196 -- egrep is non-standard and depreca...
Signed-off-by: Mario Trangoni <mjtrangoni@gmail.com>

See,

$ find . -name "*.sh" | xargs shellcheck -i SC2034

In ./roll-tarballs.sh line 34:
NULL=""
^--^ SC2034: NULL appears unused. Verify use (or export if used externally).

For more information:
  https://www.shellcheck.net/wiki/SC2034 -- NULL appears unused. Verify use (...
Signed-off-by: Mario Trangoni <mjtrangoni@gmail.com>

See,

$ find . -name "*.sh" | xargs shellcheck -i SC2002

For more information:
  https://www.shellcheck.net/wiki/SC2002 -- Useless cat. Consider 'cmd < file...
Signed-off-by: Mario Trangoni <mjtrangoni@gmail.com>

See,

$ find . -name "*.sh" | xargs shellcheck -i SC2045

In ./roll-tarballs.sh line 220:
for f in $(ls README* 2>/dev/null); do
         ^-----------------------^ SC2045: Iterating over ls output is fragile. Use globs.

For more information:
  https://www.shellcheck.net/wiki/SC2045 -- Iterating over ls output is fragi...
Signed-off-by: Mario Trangoni <mjtrangoni@gmail.com>

see,
$ find . -name "*.sh" | xargs shellcheck -i SC2086

For more information:
  https://www.shellcheck.net/wiki/SC2086 -- Double quote to prevent globbing ...
Signed-off-by: Mario Trangoni <mjtrangoni@gmail.com>

See,

$ find . -name "*.sh" | xargs shellcheck -i SC2059

In ./version.sh line 34:
printf "${VER}"
       ^------^ SC2059: Don't use variables in the printf format string. Use printf '..%s..' "$foo".

For more information:
  https://www.shellcheck.net/wiki/SC2059 -- Don't use variables in the printf...
Signed-off-by: Mario Trangoni <mjtrangoni@gmail.com>

See,

$ find . -name "*.sh" | xargs shellcheck -i SC2148

In ./replace.sh line 1:
^-- SC2148: Tips depend on target shell and yours is unknown. Add a shebang or a 'shell' directive.

For more information:
  https://www.shellcheck.net/wiki/SC2148 -- Tips depend on target shell and y...
Signed-off-by: Mario Trangoni <mjtrangoni@gmail.com>

See,

find . -name "*.sh" | xargs shellcheck -i SC2162

[...]

For more information:
  https://www.shellcheck.net/wiki/SC2162 -- read without -r will mangle backs...
Signed-off-by: Mario Trangoni <mjtrangoni@gmail.com>

See,

$ find . -name "*.sh" | xargs shellcheck -i SC2006

In ./roll-tarballs.sh line 62:
    echo "HEAD (on branch `git rev-parse --abbrev-ref HEAD`)"
                          ^-- SC2006: Use $(...) notation instead of legacy backticked `...`.

Did you mean:
    echo "HEAD (on branch $(git rev-parse --abbrev-ref HEAD))"

In ./nx-X11/x-indent-all.sh line 2:
where=`dirname $0`
      ^----------^ SC2006: Use $(...) notation instead of legacy backticked `...`.

Did you mean:
where=$(dirname $0)

In ./nx-X11/x-indent.sh line 5:
INDENT=`which gnuindent || which gindent || which indent`
       ^-- SC2006: Use $(...) notation instead of legacy backticked `...`.

Did you mean:
INDENT=$(which gnuindent || which gindent || which indent)

For more information:
  https://www.shellcheck.net/wiki/SC2006 -- Use $(...) notation instead of le...
Signed-off-by: Mario Trangoni <mjtrangoni@gmail.com>

by calling the dix version after a check

remove unneccessary parentheses

make it compile again

Thanks to Simon Matter for reporting this and the patch.

Fixes ArcticaProject/nx-libs#993