Scripting: Check for ENOTRECOVERABLE

It's part of "robust mutexes" and may not necessarily be available
(e.g. on NetBSD 9)

src/script/socket.c

@@ -28,7 +28,9 @@ static const struct _mScriptSocketErrorMapping {
 	{ ECONNREFUSED,          mSCRIPT_SOCKERR_CONNECTION_REFUSED },
 	{ EACCES,                mSCRIPT_SOCKERR_DENIED },
 	{ EPERM,                 mSCRIPT_SOCKERR_DENIED },
+#ifdef ENOTRECOVERABLE
 	{ ENOTRECOVERABLE,       mSCRIPT_SOCKERR_FAILED },
+#endif
 	{ ENETUNREACH,           mSCRIPT_SOCKERR_NETWORK_UNREACHABLE },
 	{ ETIMEDOUT,             mSCRIPT_SOCKERR_TIMEOUT },
 	{ EINVAL,                mSCRIPT_SOCKERR_UNSUPPORTED },