<AWT Dev> FW: FW: Fix for AWT on arbitrary non-reparenting window managers

[Chauncey Goss]

Wow, outlook decided to try to send this as HTML rather than plain text
and in the process screwed up the entire text. Apologies again for the triple post,
I promise I'll never do this again.

AWT currently includes a (very incomplete) hard-coded list of
non-reparenting window managers. To work around this, many distributions
patch openjdk to add support for this to be controlled by an environment
variable (_JAVA_AWT_WM_NONREPARENTING), see for instance
(https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=508650 or
https://projects.archlinux.org/svntogit/packages.git/plain/trunk/openjdk7_nonreparenting-wm.diff?h=packages/java7-openjdk)

A more minimal implementation than the above is to add an extra clause
to  isNonReparentingWM in XWM.java something along the lines of
(XWM.getWMID() == XWM.OTHER_WM &&
XToolkit.getEnv("_JAVA_AWT_WM_NONREPARENTING") != null) which avoids the
need to define a new WM.

This change seems like it would have minimal side effects but greatly
improve usability (a quick google search for java tiling window manager
reveals a lot of pain surrounding this issue).

Does this seem reasonable? Sorry if I'm breaking any protocols or am
missing prior discussions, this is my first time looking at the OpenJDK
source.