Import of old SSLeay release: SSLeay 0.9.1b (unreleased)

crypto/idea/idea_spd.c

diff --git a/crypto/idea/idea_spd.c b/crypto/idea/idea_spd.c
index 4b3eec5..98060d9 100644
--- a/crypto/idea/idea_spd.c
+++ b/crypto/idea/idea_spd.c
@@ -92,7 +92,8 @@
 #include <sys/timeb.h>
 #endif
 
-#ifdef sun
+#if defined(sun) || defined(__ultrix)
+#define _POSIX_SOURCE
 #include <limits.h>
 #include <sys/param.h>
 #endif