add sh extension

root/etc/cont-init.d/50-extensions.sh

@@ -0,0 +1,16 @@
+#!/usr/bin/with-contenv sh
+
+# clean up extensions
+for i in auth-ldap auth-duo auth-header auth-cas auth-openid auth-quickconnect auth-totp; do
+  rm -rf ${GUACAMOLE_HOME}/extensions/guacamole-${i}-${GUAC_VER}.jar
+done
+
+# if the guacamole version was bumped, delete the contents of the extensions directory - just on the first run 
+if [ "$(cat /config/.database-version)" != "$GUAC_VER" ]; then
+  rm -rf ${GUACAMOLE_HOME}/extensions/*
+fi
+
+# enable extensions
+for i in $(echo "$EXTENSIONS" | tr "," " "); do
+  cp ${GUACAMOLE_HOME}/extensions-available/guacamole-${i}-${GUAC_VER}.jar ${GUACAMOLE_HOME}/extensions
+done