+20080405
+ + begin table in curs_thread.3x manpage describing the scope of data
+ used by each function (or symbol) for threading analysis.
+ + add null-pointer checks to setsyx() and getsyx() (prompted by
+ discussion by Martin v. Lowis and Jeroen Ruigrok van der Werven on
+ python-dev2 mailing list).
+
+20080329
+ + add null-pointer checks in set_term() and delscreen().
+ + move _nc_windows into _nc_globals, since windows can be pads, which
+ are not associated with a particular screen.
+ + change use_screen() to pass the SCREEN* parameter rather than
+ stdscr to the callback function.
+ + force libtool to use tag for 'CC' in case it does not detect this,
+ e.g., on aix when using CC=powerpc-ibm-aix5.3.0.0-gcc
+ (report/patch by Michael Haubenwallner).
+ + override OBJEXT to "lo" when building with libtool, to work on
+ platforms such as AIX where libtool supports only static libraries
+ (report/patch by Michael Haubenwallner).
+ + add configure --with-pthread option, for building with the POSIX
+ thread library.
+