Remmina (#155)

* (nits)

* add hardware encoding support for Intel QSV via VAAPI

* automate RENDER_GID env var

* add remmina

* remmina: github CI

.docker/remmina/rdp.remmina

@@ -0,0 +1,90 @@
+[remmina]
+password=
+gateway_username=
+notes_text=
+vc=
+preferipv6=0
+ssh_tunnel_loopback=0
+serialname=
+sound=local
+printer_overrides=
+name=rdpdefault
+console=0
+colordepth=99
+security=
+precommand=
+disable_fastpath=0
+left-handed=0
+postcommand=
+multitransport=0
+group=
+server=
+ssh_tunnel_certfile=
+glyph-cache=0
+ssh_tunnel_enabled=0
+disableclipboard=0
+audio-output=
+parallelpath=
+monitorids=
+cert_ignore=0
+gateway_server=
+serialpermissive=0
+protocol=RDP
+old-license=0
+ssh_tunnel_password=
+resolution_mode=2
+pth=
+loadbalanceinfo=
+disableautoreconnect=0
+clientname=
+clientbuild=
+resolution_width=0
+drive=
+relax-order-checks=0
+username=
+base-cred-for-gw=0
+gateway_domain=
+network=none
+rdp2tcp=
+gateway_password=
+serialdriver=
+domain=
+profile-lock=0
+rdp_reconnect_attempts=
+restricted-admin=0
+multimon=0
+exec=
+smartcardname=
+serialpath=
+enable-autostart=0
+usb=
+shareprinter=0
+ssh_tunnel_passphrase=
+shareparallel=0
+disablepasswordstoring=0
+quality=0
+span=0
+parallelname=
+ssh_tunnel_auth=0
+keymap=
+ssh_tunnel_username=
+execpath=
+shareserial=0
+resolution_height=0
+timeout=
+useproxyenv=0
+sharesmartcard=0
+freerdp_log_filters=
+microphone=
+dvc=
+ssh_tunnel_privatekey=
+gwtransp=http
+ssh_tunnel_server=
+ignore-tls-errors=1
+disable-smooth-scrolling=0
+gateway_usage=0
+websockets=0
+freerdp_log_level=INFO
+window_maximize=1
+scale=1
+viewmode=4