fuzzing: Add fuzz tests for GUri parsing and escaping

Signed-off-by: Philip Withnall <withnall@endlessm.com>

Helps: #110

fuzzing/fuzz_uri_parse_params.c

@@ -0,0 +1,20 @@
+#include "fuzz.h"
+
+int
+LLVMFuzzerTestOneInput (const unsigned char *data, size_t size)
+{
+  GHashTable *parsed_params = NULL;
+
+  fuzz_set_logging_func ();
+
+  if (size > G_MAXSSIZE)
+    return 0;
+
+  parsed_params = g_uri_parse_params ((const gchar *) data, (gssize) size, '&', FALSE);
+  if (parsed_params == NULL)
+    return 0;
+
+  g_hash_table_unref (parsed_params);
+
+  return 0;
+}