Network: Deprecate some garbage

Deprecations on a patch version breaks release protocol, but I don't care at this point. Nobody should have been using this shit anyway.

src/pocketmine/event/server/NetworkInterfaceCrashEvent.php

@@ -26,7 +26,8 @@ namespace pocketmine\event\server;
 use pocketmine\network\SourceInterface;
 
 /**
- * Called when a network interface crashes, with relevant crash information.
+ * Never called. Should never have come into this world. Nothing to see here.
+ * @deprecated
  */
 class NetworkInterfaceCrashEvent extends NetworkInterfaceEvent{
 	/**

src/pocketmine/network/Network.php

@@ -84,10 +84,14 @@ class Network{
 
 	public function processInterfaces(){
 		foreach($this->interfaces as $interface){
-			$this->processInterface($interface);
+			$interface->process();
 		}
 	}
 
+	/**
+	 * @deprecated
+	 * @param SourceInterface $interface
+	 */
 	public function processInterface(SourceInterface $interface) : void{
 		$interface->process();
 	}

src/pocketmine/network/SourceInterface.php

@@ -71,6 +71,9 @@ interface SourceInterface{
 
 	public function shutdown();
 
+	/**
+	 * @deprecated
+	 */
 	public function emergencyShutdown();
 
 }

src/pocketmine/network/mcpe/RakLibInterface.php

@@ -89,7 +89,7 @@ class RakLibInterface implements ServerInstance, AdvancedSourceInterface{
 
 	public function start(){
 		$this->server->getTickSleeper()->addNotifier($this->sleeper, function() : void{
-			$this->server->getNetwork()->processInterface($this);
+			$this->process();
 		});
 		$this->rakLib->start(PTHREADS_INHERIT_CONSTANTS); //HACK: MainLogger needs constants for exception logging
 	}