support for multiple parallel honggfuzz processes in socketfuzzer mode

Adds pid to socket used for socketfuzzer mode, so it is possible
to start and use multiple honggfuzz instances at the same time.
diff --git a/socketfuzzer.c b/socketfuzzer.c
index b039077..14a5f24 100644
--- a/socketfuzzer.c
+++ b/socketfuzzer.c
@@ -124,8 +124,7 @@
     socklen_t t;
     struct sockaddr_un local, remote;
     char socketPath[512];
-    // snprintf(socketPath, sizeof(socketPath), "/tmp/honggfuzz_socket.%i", getpid());
-    snprintf(socketPath, sizeof(socketPath), "/tmp/honggfuzz_socket");
+    snprintf(socketPath, sizeof(socketPath), "/tmp/honggfuzz_socket.%i", getpid());
 
     if ((s = socket(AF_UNIX, SOCK_STREAM, 0)) == -1) {
         perror("socket");
@@ -161,7 +160,6 @@
 
 void cleanupSocketFuzzer() {
     char socketPath[512];
-    // snprintf(socketPath, sizeof(socketPath), "/tmp/honggfuzz_socket.%i", getpid());
-    snprintf(socketPath, sizeof(socketPath), "/tmp/honggfuzz_socket");
+    snprintf(socketPath, sizeof(socketPath), "/tmp/honggfuzz_socket.%i", getpid());
     unlink(socketPath);
 }