Support multiple onion services for different local ports.

[a-t-0]

Source: https://stackoverflow.com/questions/64646146/how-can-i-have-multiple-tor-onions-pointing-to-the-same-listening-port

It is possible to create multiple onion services that point to the same port/application. To do this, create multiple HiddenService configurations with different data directories pointing to the same port:

torrc

# Hidden service instance 1
HiddenServiceDir /var/lib/tor/hs-1/
HiddenServiceVersion 3
HiddenServicePort 80 127.0.0.1:8080

# Hidden service instance 2
HiddenServiceDir /var/lib/tor/hs-2/
HiddenServiceVersion 3
HiddenServicePort 80 127.0.0.1:8080

For each HiddenServiceDir/HiddenServicePort combination you create that points to the same port, you will get a different onion address which ultimately point to the same service.

• [x] Allow the user to specify the projects in CLI args as: <local_port_nr>:<project_name>:<external_port_nr>-<local_port_nr>:<project_name>:<external_port_nr> etc.
• [x] Then split those into a list of projects.
• [x] Give the user the option: one domain per project (or not) as boolean cli arg.
• [x] If one domain per project: loop over the code, generate the hostnames/onion domains, and then
• [ ] if one domain for all projects, generate the hostname with <project_name_0>_<project_name_1> etc.
• [x] add the accumulated data into torrc. (Distinguish in the project names end content based on the one-domain-per-service or not boolean).

Then also generate mutliple ssl certs per service.

• [x] Store the root CA in certificates/root
• [x] Store the <service_name> certificates in certificates/<service_name>.