Moved HTTP client, ssl and some util code into separate files

build/src/util.c

@@ -0,0 +1,11 @@
+#include "internal.h"
+
+// Return fake connection structure. Used for logging, if connection
+// is not applicable at the moment of logging.
+static struct mg_connection *fc(struct mg_context *ctx) {
+  static struct mg_connection fake_connection;
+  fake_connection.ctx = ctx;
+  // See https://github.com/cesanta/mongoose/issues/236
+  fake_connection.event.user_data = ctx->user_data;
+  return &fake_connection;
+}