Captcha for the forum

The extension adds captcha from PPK to the forum
Captcha has two options for working, standard - a simple set of letters and numbers, extended - a set of letters and numbers with input in a certain order
Fonts or image sets can be used as symbols
It is possible to set the background color, symbol color (only if fonts are used), as well as fill the captcha with horizontal and/or vertical lines
You can define a random color for options where it is used, in whole or only in one or several channels