Allow for https

[Aypac]

As seen in #7 it might be neccessairy to use https for some queries. Make that work.

[Aypac]

See page 7 of https://avm.de/fileadmin/user_upload/Global/Service/Schnittstellen/AVM_TR-064_first_steps.pdf
One has to use a different port:
https://192.168.178.1:49443/tr64desc.xml

[RoSchmi]

Due to advertently using a wrong format for the AIN of Fritz!Dect 200 I had problems to get my application working.
Initially not knowing the reason, I first thought that it was needed to switch to https transmission to make it working, so I made a modification of your library to work with https. Unfortunately my code is not as compatible with your library as it should be.
However perhaps it might be helpful if you are going to switch to https in some time.

https://github.com/RoSchmi/Esp32_Fritzbox_TR064_FritzDect_Controller

Kind regards and many thanks for your great library

[Aypac]

Hi RoSchmi,

thanks for the information! I would probably not switch over, but rather add the capability. However, I currently struggle to even keep up with maintenance of this library and unfortunately I cannot use it 'in production' myself anymore, so even debugging is a bit annoying. So if anyone wants to take this further, please go ahead and submit a PR :)

Cheers,
René