fix: update NetSurf port & montauk frontend to use new paths for fonts and icons

www-client/netsurf/patches/0002-respath-separator-montaukos.patch

@@ -1,14 +1,34 @@
 diff --git a/frontends/monkey/main.c b/frontends/monkey/main.c
-index 463f0bea6..578d148e4 100644
+index 463f0bea6..04b0e1c9f 100644
 --- a/frontends/monkey/main.c
 +++ b/frontends/monkey/main.c
-@@ -422,7 +422,12 @@ main(int argc, char **argv)
+@@ -422,7 +422,32 @@ main(int argc, char **argv)
  	setbuf(stderr, NULL);
  
  	/* Prep the search paths */
 +#if defined(__montauk__)
++	char bundle_res[PATH_MAX];
++	char resource_path[PATH_MAX * 2];
++	const char *exec_path = argv[0];
++	const char *last_slash = strrchr(exec_path, '/');
++	size_t bundle_dir_len = last_slash == NULL ? 0 :
++		(size_t)(last_slash - exec_path + 1);
++
++	/* Locate res/ beside the running ELF so the app bundle is relocatable.
++	 * MONKEY_RESPATH remains as a fallback for older startup environments. */
++	if (bundle_dir_len > 0 &&
++	    bundle_dir_len + sizeof("res/") <= sizeof(bundle_res)) {
++		memcpy(bundle_res, exec_path, bundle_dir_len);
++		memcpy(bundle_res + bundle_dir_len, "res/", sizeof("res/"));
++	} else {
++		snprintf(bundle_res, sizeof(bundle_res), "%s", MONKEY_RESPATH);
++	}
++
 +	/* see NS_RESPATH_SEP: ':' is part of a MontaukOS drive path */
-+	respaths = nsmonkey_init_resource("${HOME}/.netsurf/;${NETSURFRES};"MONKEY_RESPATH";./frontends/monkey/res");
++	snprintf(resource_path, sizeof(resource_path),
++		"${HOME}/.netsurf/;${NETSURFRES};%s;%s;./frontends/monkey/res",
++		bundle_res, MONKEY_RESPATH);
++	respaths = nsmonkey_init_resource(resource_path);
 +#else
  	respaths = nsmonkey_init_resource("${HOME}/.netsurf/:${NETSURFRES}:"MONKEY_RESPATH":./frontends/monkey/res");
 +#endif