+ modify _nc_panelhook() data to account for a permanent memory leak.
+ fix memory leaks in test/demo_menus
+ fix most warnings from Klocwork tool (report by Larry Zhou).
+ modify configure script CF_XOPEN_SOURCE macro to add case for
"dragonfly" from xterm #236 changes.
+ modify configure script --with-hashed-db to let $LIBS override the
search for the db library (prompted by report by Samson Pierre).
+ update test programs to build/work with various UNIX curses for
comparisons. This was to reinvestigate statement in X/Open curses
that insnstr and winsnstr perform wrapping. None of the Unix-branded
implementations do this, as noted in manpage (cf: 20040228).
