Multiple port overrides

[xh4vm]

Added support for multiple port overrides in Medusa core

Now you can specify multiple target hosts with custom ports in a file ssh_targets.txt (one per line in format host:port):

127.0.0.1:5222
127.0.0.1:22
127.0.0.1:2222

Usage example:

medusa -H ./ssh_targets.txt -u root -P ./passwords.txt -M ssh -t 10