All relatively harmless, low risk changes for B12:

Change 1: A few references to /java remain, where I can I'll remove these
         from being printed out, either if the path does not exist or if
         OPENJDK=true. I may need some flexibility here.

Change 2: Completely remove all the references to PREVIOUS_JDK* variables.
         These should be ifdef'd on SKIP_COMPARE_IMAGES, which is defaulted
         to true now for OPENJDK builds, so these settings are not used at all
         with OPENJDK builds by default.

Change 3: Reference to MOZILLA_HEADERS and GCC29* variables should not be
         printed out if the plugin is not being built.

Change 4: The LANG setting of en_US is fine, allow this without a warning.

Change 5: The HOTSPOT_DOCS warning is bogus, should be removed if NO_DOCS=true,
         which it should be the default for OpenJDK.

Change 6: IF OPENJDK, skip the particular OS and gcc compiler warning
         completely. (The minimum OS/gcc checks still catch using OLD systems).

Change 7: If OPENJDK, do not warn about the CUPS location used.


Lastly, one more proposed change that might be more controversial:

Change 8: By default OPENJDK builds should not generate docs (javadocs) or
         create the fastdebug builds. Just create the product JDK binary
         images. Extra 'make' targets would need to be used if they want
         docs or fastdebug images.
         This does not change the formal closed JDK builds.

---

Also, try to change ALT_MOTIF_DIR to a /usr default, allowing for Solaris and Linux pre-packaged files which
would not have the extra "motif" subdirectory. The sanity check may need to change too.

Also, add a "clean" rule to the top level control/make/Makefile.