Add Optional MySQL Support (#99)

* Added missing package for guac-install-server.sh.

* Minor cleanup of Duo configuration settings.

* Prompt test.

* Working on adding prompts and replacing MySQL information with variables.

* Improved switch/variable management and checking, only prompt for values not already passed via command line switches.

* Removed variable that shouldn't be there.

* Updated switches.

* Updated readme to include new information and all switches.

* Updated readme again.

* -Updated variables and switches to match install script.
-Added check for MySQL host, prompt if necessary.

* Updated scripts to use given MySQL host/port when executing scripts.

* Fixed typo and removed line that always fails.

* More fixes.

* Added line back in.

* Added starting services message to upgrade script.

guac-install-server.sh

@@ -32,7 +32,7 @@ fi
 apt update
 apt -y install build-essential libcairo2-dev ${JPEGTURBO} ${LIBPNG} libossp-uuid-dev libavcodec-dev libavutil-dev \
 libswscale-dev freerdp2-dev libpango1.0-dev libssh2-1-dev libtelnet-dev libvncserver-dev libpulse-dev libssl-dev \
-libvorbis-dev libwebp-dev jq curl wget libtool-bin
+libvorbis-dev libwebp-dev jq curl wget libtool-bin libwebsockets-dev
 
 # If apt fails to run completely the rest of this isn't going to work...
 if [ $? != 0 ]