+ add configure check to distinguish clang from gcc to eliminate
warnings about unused command-line parameters when compiler warnings
are enabled.
+ improve behavior when updating terminfo entries which are hardlinked
by allowing for the possibility that an alias has been repurposed to
a new primary name.
+ fix some strict compiler warnings based on package scripts.
+ further fixes for configure check for working poll (Debian #676461).
+ compiler warning fixes for test programs.
+ various build-fixes for test-programs with pdcurses.
+ updated configure checks for X packages in test/configure from xterm
#267 changes.
+ add configure check to gnatmake, to accommodate cygwin.
+ correct limit-check in wredrawln, accounting for begy/begx values
(patch by David Benjamin).
+ fix most compiler warnings from clang.
+ amend build-fix for OpenSolaris, to ensure that a system header is
included in curses.h before testing feature symbols, since they
may be defined by that route.
+ 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).
