+20100403
+ + add configure check for exctags vs ctags, to work around pkgsrc.
+ + simplify logic in _nc_get_screensize() to make it easier to see how
+ environment variables may override system- and terminfo-values
+ (prompted by discussion with Igor Bujna).
+ + make debug-traces for COLOR_PAIR and PAIR_NUMBER less verbose.
+ + improve handling of color-pairs embedded in attributes for the
+ extended-colors configuration.
+ + modify MKlib_gen.sh to build link_test with sp-funcs.
+ + build-fixes for OpenSolaris aka Solaris 11, for wide-character
+ configuration as well as for rpath feature in *-config scripts.
+