add static-rsa prefs

commented out as per proposal (C) @ https://github.com/ghacksuserjs/ghacks-user.js/issues/24#issue-209476365

user.js

@@ -613,6 +613,10 @@ user_pref("browser.ssl_override_behavior", 1);
  * only works when it's possible to add an exception, i.e doesn't work for HSTS (https://subdomain.preloaded-hsts.badssl.com/)
  * test: https://expired.badssl.com/ ***/
 user_pref("browser.xul.error_pages.expert_bad_cert", true);
+/* 1224: disable the remaining non-modern cipher suites as of FF51
+ * [NOTE] commented out because it still breaks too many sites ***/
+   // user_pref("security.ssl3.rsa_aes_128_sha", false);
+   // user_pref("security.ssl3.rsa_aes_256_sha", false);
 
 /*** 1400: FONTS ***/
 user_pref("ghacks_user.js.parrot", "1400 syntax error: the parrot's bereft of life!");