FS-3776 --resolve FreeBSD changes for spandsp

configure.in

@@ -537,6 +537,8 @@ if test "x${ac_cv_func_mlockall}" = "xyes"; then
 		USE_MLOCKALL=yes
 		;;
 	*-freebsd*)
+		APR_ADDTO(SWITCH_AM_CFLAGS, -fPIC)
+		APR_ADDTO(SWITCH_AM_CXXFLAGS, -fPIC)
 		AC_MSG_RESULT([no, broken for non-root users])
 		;;
 	*)

src/mod/applications/mod_spandsp/mod_spandsp_modem.h

@@ -49,6 +49,9 @@
 #ifdef __APPLE__
 #include <util.h>
 #include <sys/ioctl.h>
+#elif defined(__FreeBSD__)
+#include <libutil.h>
+#include <termios.h>
 #else
 #include <pty.h>
 #endif