+ fix some strict compiler warnings in ncurses library.
+ modify configure macro CF_HEADER_PATH to not look for variations in
the predefined include directories.
+ improve configure macros CF_GCC_VERSION and CF_GCC_WARNINGS to work
with gcc 4.x's c89 alias, which gives warning messages for cases
where older versions would produce an error.
+ quiet some pedantic gcc warnings.
+ modify _nc_wgetch() to check for a -1 in the fifo, e.g., after a
SIGWINCH, and discard that value, to avoid confusing application
(patch by Eygene Ryabinkin, FreeBSD bin/136223).
+ improve discussion in INSTALL for use of system's tic/infocmp for
cross-compiling and building fallbacks.
+ modify test/demo_termcap.c to correspond better to options in
test/demo_terminfo.c
+ continue integrating "sp-funcs" by Juergen Pfeifer (incomplete).
+ fix logic for 'V' in test/ncurses.c tests f/F.
+ add configure script --enable-sp-funcs to enable the new set of
extended functions.
+ start integrating patches by Juergen Pfeifer:
+ add extended functions which specify the SCREEN pointer for several
curses functions which use the global SP (these are incomplete;
some internals work is needed to complete these).
+ add special cases to configure script for MinGW port.
+ add new functions to lib_trace.c to setup mutex's for the _tracef()
calls within the ncurses library.
+ for the reentrant model, move _nc_tputs_trace and _nc_outchars into
the SCREEN.
+ start modifying test/worm.c to provide threading demo (incomplete).
+ separated ifdef's for some BSD-related symbols in tset.c, to make
it compile on LynxOS (report by Greg Gemmer).
