patch 8.1.1225: cannot create a pty to use with :terminal on FreeBSD
Problem: Cannot create a pty to use with :terminal on FreeBSD.
Solution: Add support for posix_openpt(). (Ozaki Kiichi, closes #4306,
closes #4289)
diff --git a/src/config.h.in b/src/config.h.in
index 7fe65de..3f122fd 100644
--- a/src/config.h.in
+++ b/src/config.h.in
@@ -180,6 +180,7 @@
#undef HAVE_NANOSLEEP
#undef HAVE_NL_LANGINFO_CODESET
#undef HAVE_OPENDIR
+#undef HAVE_POSIX_OPENPT
#undef HAVE_PUTENV
#undef HAVE_QSORT
#undef HAVE_READLINK