GUACAMOLE-1026: Mark FreeRDP 3.x as currently experimental.#599

necouchman merged 2 commits intoapache:staging/1.6.0apache/guacamole-server:staging/1.6.0from

mike-jumper:mark-freerdp3-experimentalmike-jumper/guacamole-server:mark-freerdp3-experimentalCopy head branch name to clipboard