Implementation multi pattern regular expressions

[biathlon3]

[biathlon3]

For deployment see file install.txt. Description will be expanded.

[biathlon3]

This PR works on Kernel 6.8.9

Description of using hscollider - http://intel.github.io/hyperscan/dev-reference/tools.html

Description of regular expression syntax - https://perldoc.perl.org/perlre It is supported in Hyperscan not fully, constraints described here - http://intel.github.io/hyperscan/dev-reference/compilation.html

Now regex implemented in tempasta config as fallows: for locations, added keyword "regex" and regex started with "^"; for httptables, regex started with "^".

for example:

location regex "^/new/" {
    frang_limits {
	http_body_len 5;
	http_strict_host_checking true;
    }
}

http_chain {
  uri == "^/html/" -> default;
  -> default;
}

[biathlon3]

I squashed it into one commit so it can be reviewed.