resolves #77: exit noisily on ::bind failure

src/server.cpp

@@ -502,8 +502,8 @@ kj::Promise<void> Server::handleFdRead(kj::AsyncInputStream* stream, char* buffe
 }
 
 void Server::taskFailed(kj::Exception &&exception) {
-    // An unexpected http connection close can cause an exception, so don't re-throw.
-    // TODO: consider re-throwing selected exceptions
-    LLOG(INFO, exception);
     //kj::throwFatalException(kj::mv(exception));
+    // prettier
+    fprintf(stderr, "fatal: %s\n", exception.getDescription().cStr());
+    exit(EXIT_FAILURE);
 }