fix: add Windows specific characters to config value syntax

[airween]

what

This PR fixes a bug: if the host is a Windows based server, and admin wants to set any path where the directory name contains space (and the separator is the blackslash), then parser throws an error.

These characters have been added:

• space
• \ (backslash) (it's escaped, so this is it: \\
• ( and ) (parenthesis) (these are also escaped)

why

The problem is described in #3429.

references

#3429

[airween]

See #3429 - @skvoboo-gh tested this on Windows.

[sonarqubecloud]

Quality Gate passed

Issues
6 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[airween]

Okay, I found the problem and fixed it. Recent changes:

• d8574c8: I fixed the regex in the failed regression test; see previous issue
• 013c8c2: I put back @theseion's suggestion
  • it seems like the syntax produced the same tokenizer, because I re-generated the file seclang-scanner.cc, and it's the same, no diff