build: Add "ncurses{t,tw}" to possible ncurses names

"ncursest" and "ncursestw" are multi-threaded variants of the ncurses
library. The "t" library names are only used in operating systems that
do not support weak symbols (so you won't see such names in Linux), but
the names are documented in ncurses anyway. Adding them to the list of
names to check won't hurt.

* See the curs_threads(3X) man page, and the INSTALL file from ncurses
  package. Notably the "--enable-reentrant", "--with-pthread" and
  "--enable-weak-symbols" options in ncurses.

Signed-off-by: Kang-Che Sung <[email protected]>

configure.ac

@@ -416,10 +416,12 @@ AC_ARG_ENABLE([unicode],
 AC_ARG_VAR([CURSES_CFLAGS], [C compiler flags for curses; this overrides auto detected values])
 AC_ARG_VAR([CURSES_LIBS], [linker flags for curses; this overrides auto detected values])
 
-curses_pkg_names="ncurses6 ncurses5 ncurses curses"
+curses_pkg_names="ncurses6 ncurses5 ncurses ncursest6 ncursest5 \
+   ncursest curses"
 
 if test "x$enable_unicode" = xyes; then
-   curses_pkg_names="ncursesw6 ncursesw5 ncursesw $curses_pkg_names"
+   curses_pkg_names="ncursesw6 ncursesw5 ncursesw ncursestw6 ncursestw5 \
+      ncursestw $curses_pkg_names"
 fi
 
 AC_ARG_WITH([curses],