title: gitea: Built-in ssh server not starting when sshd server running
body: <p>I have a problem with my gitea version 1.15.5 running on my raspberry pi. I appears that the built in ssh server is not starting:</p>
  <pre><code>ssh -p 2222 git@myaddress.com
  ssh: connect to host myaddress.com port 2222: Connection refused
  </code></pre>
  <p>I already assured that &quot;myaddress.com&quot; points to the correct machine and that the firewall rules are adapted. The web interface works just fine.</p>
  <p>When I checked, if the port is actually used by gitea, I realized the built-in ssh server is not running:</p>
  <pre><code>sudo lsof -i -P -n | grep LISTEN
  
  sshd        [...]      root    [...]  TCP *:22 (LISTEN)
  sshd        [...]      root    [...]  TCP *:22 (LISTEN)
  [...]
  gitea       [...]       git    [...]  TCP *:3000 (LISTEN)
  </code></pre>
  <p>As you can see, there is no process listening on port 2222.
  I have an internal sshd server running on that machine at port 22 and I would like to keep those two seperate, if possible. Or is the problem lying there and you can't use the built-in gitea ssh server together with an sshd server?</p>
  <p>Here is an excerpt of my <code>app.ini</code> configuration:</p>
  <pre><code>APP_NAME = gitea
  RUN_USER = git
  RUN_MODE = prod
  
  [server]
  SSH_DOMAIN       = myaddress.com
  DOMAIN           = myaddress.com
  HTTP_PORT        = 3000
  ROOT_URL         = https://myaddress.com/
  DISABLE_SSH      = false
  SSH_PORT         = 2222
  </code></pre>