Fork vhosts before creating the socket.

[jjnicola]

This solves the issue in which a parent process creates a socket
and child processes inheritates the socket but are not allow to use it.
Now, each child uses its own socket.

[cfi-gb]

I can confirm that this fixes scanning SSL/TLS services for me.

Unfortunately i cannot judge on the C-Code changes (e.g. if hostname needs to be freed as well), this needs to be reviewed and approved by a @greenbone/gvm-dev member.

[jjnicola]

I can confirm that this fixes scanning SSL/TLS service for me.

Unfortunately i cannot judge on the C-Code changes (e.g. if hostname needs to be freed as well), this needs to be reviewed and approved by a @greenbone/gvm-dev member.

Thanks a lot for testing @cfi-gb

[cfi-gb]

Backport to the openvas-7.0 branch which is also affected in #579