* Memory usage optimized for comparison of large directories.
* In overview for two way diff show if only one side contains text.
* If text is selected in either input or output window use that in
Find dialog.
* Command line option --cs doesn't change the config value permanently
anymore.
Also remove unneeded flags from CXXFLAGS, sync WANTLIB, and update my
email address.
Thank you to brad@, espie@, and pascal@ for guidance on fixing
CXXFLAGS, and Amit Kulkarni for testing.
Tested on amd64 and i386.
OK brad@ sthen@
2ceebb941a