[OptionOfT]

What do you mean by +P?

[black_knight]

Presumably, .+P is regex referring too all the acronyms ending with P, that is Protocol. SMTP, HTTP, FTP, IMAP, XMPP…

[rexreed]

Looks like .+P is just a regex way of saying any set of characters / protocol ending in P.

[juped]

Nothing, as they said .+P (note the dot)