[Feature] Custom subdomain for tunnel #11
Description
What problem does this solve?
It lets users spawn multiple tunnels with custom subdomains.
They usually need it if/when their default username (as subdomain) is already busy (either taken by themselves or sb else)
Proposed Solution
On the relay server we store http tunnels in a map with the key being the subdomain, subdomain currently is <username>.xpos-it.com, if the user requests a tunnel with a custom subdomain (xpos http 3000 -s custom) custom.xpos-it.com should be reserved for the user, of course, if the subdomain is available.
Alternatives Considered
No response