Parse error domains containing xn--

[Maka0]

Upgraded to 0.22 (skipped 0.21 due to the parsing rework) but now the parsing of blocklist fail when it finds domains containing xn--. For example using blocklist https://big.oisd.nl/regex the following errors are shown:

[2023-09-02 16:45:58]  WARN list_cache: parse error: line 2592: 2 errors occurred:
	* idna: invalid label "aptslabs-6fd\\": /^(.*\.)?2023\.xn--aptslabs-6fd\.net$/
	* invalid ip: /^(.*\.)?2023\.xn--aptslabs-6fd\.net$/

, trying to continue count=2580 source=https://big.oisd.nl/regex
[2023-09-02 16:45:59]  WARN list_cache: parse error: line 13224: 2 errors occurred:
	* idna: invalid label "futuroenespaol-1nb\\": /^(.*\.)?adbmetrics\.xn--futuroenespaol-1nb\.es$/
	* invalid ip: /^(.*\.)?adbmetrics\.xn--futuroenespaol-1nb\.es$/

, trying to continue count=13211 source=https://big.oisd.nl/regex
[2023-09-02 16:46:00]  WARN list_cache: parse error: line 33199: 2 errors occurred:
	* idna: invalid label "55qx5d\\": /^(.*\.)?autodiscover\.xn--55qx5d\.cn$/
	* invalid ip: /^(.*\.)?autodiscover\.xn--55qx5d\.cn$/

, trying to continue count=33185 source=https://big.oisd.nl/regex
[2023-09-02 16:46:00]  WARN list_cache: parse error: line 33200: 2 errors occurred:
	* idna: invalid label "90amc\\": /^(.*\.)?autodiscover\.xn--90amc\.xn--p1acf$/
	* invalid ip: /^(.*\.)?autodiscover\.xn--90amc\.xn--p1acf$/

, trying to continue count=33185 source=https://big.oisd.nl/regex
[2023-09-02 16:46:00]  WARN list_cache: parse error: line 33201: 2 errors occurred:
	* idna: invalid label "gnstigbestellen-zvb\\": /^(.*\.)?autodiscover\.xn--gnstigbestellen-zvb\.de$/
	* invalid ip: /^(.*\.)?autodiscover\.xn--gnstigbestellen-zvb\.de$/

, trying to continue count=33185 source=https://big.oisd.nl/regex

[0xERR0R]

I can reproduce this error. We're trying to convert the hostname from puny code to ASCII, even if it is a regex. I changed this behavior: regex will not be converted. @ThinkChaos please check, if it is ok :)