Fix available property for nic.cl and dns.pt

[sofia-bahamonde]

Regex comparison was outdated:

[silva96]

@sofia-bahamonde this project is not maintained anymore, please refer to this fork:

https://github.com/jarthod/whois-parser

This is actually working in the fork (see this commit).

Here's the response from @jarthod regarding the "unmaintained project"

https://github.com/weppos/whois-parser/pull/154#issuecomment-1384416722