LibC: Add stubs that I have locally

I'm not sure if these are used by anything but I would assume so as I
have added them :D

functions added:
- getprotobyname
- open_memstream
- munlock
- lockf
- nice
- crypt
- getsid
- wcstoul

userspace/libraries/LibC/netdb.cpp

@@ -319,3 +319,9 @@ struct servent* getservbyname(const char* name, const char* proto)
 	dwarnln("TODO: getservbyname(\"{}\", \"{}\")", name, proto);
 	return nullptr;
 }
+
+struct protoent* getprotobynumber(int proto)
+{
+	dwarnln("TODO: getprotobynumber({})", proto);
+	return nullptr;
+}