Add link between source mountpoint and its connection to enable auto-kick of inactive sources

[AskMeCode]

• Added a connection_t *con field to the source_t struct to store the associated connection.
• Added a char *mountpoint field to source_t for direct reference to the mountpoint name.
• These fields allow identifying and kicking an inactive source directly without relying on HTML parsing.
• Plan to initialize these fields in add_source() during source registration.

[goblimey]

Thanks for your  interest.  Your idea sounds very sensible to me.

However, I didn't write the NTRIP caster.  It was written for BKG, a German organisation that supports accurate GNSS.  I simply took their solution and got it running under Docker to make it easier to install.
  
BKG still maintain and support the caster, so you need to talk to them.  In any case,  not everybody uses my docker version so giving the changes to them would be more useful.  Also, you should work from their latest version.  Mine is out of date and needs upgrading.

If you hunt through my (very long-winded) Readme, you will see how to find the BKG organisation.

Regards

Simon