Added -w option

test/unit_test.c

@@ -0,0 +1,13 @@
+#include "mongoose.c"
+
+int main(void) {
+  assert(match_prefix("/a/", 3, "/a/b/c") == 3);
+  assert(match_prefix("/a/", 3, "/ab/c") == 0);
+  assert(match_prefix("/*/", 3, "/ab/c") == 4);
+  assert(match_prefix("**", 2, "/a/b/c") == 6);
+  assert(match_prefix("/*", 2, "/a/b/c") == 2);
+  assert(match_prefix("*/*", 3, "/a/b/c") == 2);
+  assert(match_prefix("**/", 3, "/a/b/c") == 5);
+
+  return 0;
+}