yassl build fixes for hpux and netware

extra/yassl/include/yassl_int.hpp:
  Netware and HPUX need the _POSIX_THREADS define to be forced
extra/yassl/taocrypt/include/hmac.hpp:
  Prefix with HMAC as we get symbol conflicts on HPUX

extra/yassl/include/yassl_int.hpp

@@ -40,6 +40,13 @@
 #include "lock.hpp"
 #include "openssl/ssl.h"  // ASN1_STRING and DH
 
+// Check if _POSIX_THREADS should be forced
+#if !defined(_POSIX_THREADS) && (defined(__NETWARE__) || defined(__hpux))
+// HPUX does not define _POSIX_THREADS as it's not _fully_ implemented
+// Netware supports pthreads but does not announce it
+#define _POSIX_THREADS
+#endif
+
 #ifdef _POSIX_THREADS
     #include <pthread.h>
 #endif

extra/yassl/taocrypt/include/hmac.hpp

@@ -60,12 +60,12 @@ private:
     T     mac_;
 
     // MSVC 6 HACK, gives compiler error if calculated in array
-    enum { BSIZE = T::BLOCK_SIZE  / sizeof(word32),
-           DSIZE = T::DIGEST_SIZE / sizeof(word32) };
+    enum { HMAC_BSIZE = T::BLOCK_SIZE  / sizeof(word32),
+           HMAC_DSIZE = T::DIGEST_SIZE / sizeof(word32) };
 
-    word32 ip_[BSIZE];          // align ipad_ on word32
-    word32 op_[BSIZE];          // align opad_ on word32
-    word32 innerH_[DSIZE];      // align innerHash_ on word32
+    word32 ip_[HMAC_BSIZE];          // align ipad_ on word32
+    word32 op_[HMAC_BSIZE];          // align opad_ on word32
+    word32 innerH_[HMAC_DSIZE];      // align innerHash_ on word32
 
     void KeyInnerHash();