configure.ac: Fix typo s/optionnal/optional/
@@ -461,7 +461,7 @@ if test "x$enable_ssdp" = xyes ; then
AC_DEFINE(UPNP_HAVE_SSDP, 1, [see upnpconfig.h])
fi
-RT_BOOL_ARG_ENABLE([optssdp], [yes], [optionnal SSDP headers support)])
+RT_BOOL_ARG_ENABLE([optssdp], [yes], [optional SSDP headers support)])
if test "x$enable_optssdp" = xyes ; then
AC_DEFINE(UPNP_HAVE_OPTSSDP, 1, [see upnpconfig.h])
enable_uuid=yes
