--ignore option does not accept all control characters

[ralphlange]

Reported by @hjunkes:

The --ignore command line option does not cover all control characters.
Specifying --ignore ^] leads to the caret ^ and closing bracket ] characters being ignored, while control-] is still passed through.

[ralphlange]

Correct.

procServ/procServ.cc

Line 329 in 52594e2

} else if ( optarg[i] == '^' && optarg[i+1] >= 'A' && optarg[i+1] <= 'Z' ) {

That should cover the complete page of characters, from '@' (0x40) to '_' (0x5F)

[ralphlange]

@dirk-zimoch adds:

https://en.wikipedia.org/wiki/Caret_notation
Note that ^^ is x1e (30) and cannot be used to express a literal ^