Support remote DB parameter for install script

During the manual installation it's not possible to define a remote DB host/port (which is MySQL in my case) for the install script.

AFAIK it was possible for previous/older FreePBX versions.

I already started digging into it. The asterisk DB is used correctly, but I failed to set the CDR variables in the install script. Hence the

fwconsole ma installlocal --skipchown

call fails, because it tries to connect to the local socket.

I tried to configure the variables in "/etc/amportal.conf" and even in "/etc/freepbx.conf" manually. Even after a restart the installlocal call fails.

"fwconsole setting" works fine, but I can use that only after installation.

If someone could point me into the right direction I'd like to change it and create a PR then.