Userland: Tighten a *lot* of pledges! :^)

Since applications using Core::EventLoop no longer need to create a
socket in /tmp/rpc/, and also don't need to listen for incoming
connections on this socket, we can remove a whole bunch of pledges!

Userland/Services/WebServer/main.cpp

@@ -37,7 +37,7 @@ int main(int argc, char** argv)
         return 1;
     }
 
-    if (pledge("stdio accept rpath inet unix cpath fattr", nullptr) < 0) {
+    if (pledge("stdio accept rpath inet unix", nullptr) < 0) {
         perror("pledge");
         return 1;
     }