Fix mem leak

src/main.c

@@ -1,3 +1,12 @@
+/*
+ * Design Doc:
+ * The server is broken into the following files:
+ *  - main.c: Argument parsing and high-level control
+ *  - http.c: HTTP request parsing and response formatting
+ *  - server.c: Abstraction over sockets
+ *  - threadpool.c: Thread pool and wokr queue implementation
+ *  - util.c: Misc. utility functions
+ */
 #include "http.h"
 #include "server.h"
 #include "threadpool.h"
@@ -327,6 +336,10 @@ static void handle_connection(void *arg) {
     fclose(conn);
 }
 
+static void fclose_free_func(void *file) {
+    fclose(file);
+}
+
 int main(int argc, const char **argv) {
     setenv("POSIXLY_CORRECT", "1", true);
     GlobalFlags flags = DEFAULT_FLAGS;
@@ -367,7 +380,7 @@ int main(int argc, const char **argv) {
             close(conn_fd);
             continue;
         }
-        thread_pool_enqueue(pool, handle_connection, conn);
+        thread_pool_enqueue(pool, handle_connection, conn, fclose_free_func);
     }
     destroy_thread_pool(pool);
     destroy_server(server);