Re-enable the services kit from GSOC 2010

* Use a public domain MD5 implementation when the OpenSSL one is not available
 * No functional changes

headers/os/net/UrlProtocol.h

@@ -21,6 +21,7 @@ public:
 										BUrlResult* result,
 										const char* threadName,
 										const char* protocolName);
+	virtual							~BUrlProtocol();
 										
 	// URL protocol required members
 	// TODO: (stippi) I know it's sometimes appealing to have these

headers/os/net/UrlProtocolDispatchingListener.h

@@ -36,6 +36,7 @@ public:
 									BHandler* handler);
 								BUrlProtocolDispatchingListener(
 									const BMessenger& messenger);
+	virtual						~BUrlProtocolDispatchingListener();
 
 	virtual	void				ConnectionOpened(BUrlProtocol* caller);
 	virtual void				HostnameResolved(BUrlProtocol* caller,