Bugzilla bug #33043: use System V shared memory and semaphores on

Solaris 2.5.1 because the POSIX shared memory and semaphore functions
fail with ENOSYS.

nsprpub/pr/include/md/_solaris.h

@@ -70,8 +70,13 @@
 #define _PR_POLL_AVAILABLE
 #define _PR_USE_POLL
 #define _PR_STAT_HAS_ST_ATIM
+#ifdef SOLARIS2_5
+#define _PR_HAVE_SYSV_SEMAPHORES
+#define PR_HAVE_SYSV_NAMED_SHARED_MEMORY
+#else
 #define _PR_HAVE_POSIX_SEMAPHORES
 #define PR_HAVE_POSIX_NAMED_SHARED_MEMORY
+#endif
 #define _PR_HAVE_GETIPNODEBYNAME
 #define _PR_HAVE_GETIPNODEBYADDR
 #define _PR_INET6_PROBE