Fix parsing bug where includes are skipped

[gabrielrussoc]

The SSH config parser avoids parsing everything inside a Host block that does not match the host we are trying to connect to.

This makes sense, but the implementation fails on some cases. Consider the following:

et host.company

Host other.company
    User someone
Include ~/.ssh/host.company

And inside ~/.ssh/host.company we have:

Host host.company
    User gabriel

The way the parser works now is:

• Sees the Host other.company and sets parsing = 0 because it does not match the target host.company.
• Skips processing the Include completely because parsing = 0.
• Misses the actual configs defined for Host host.company.

This PR simply does not ignore Include directives to avoid such cases.