Replace pcre with pcre2

[ndren]

Thank you @psychon for fixing the patch I've sent over email. This should fix #6838.

[ndren]

I'm not too sure how to fix the build since pcre was not listed in any of the .yml build files. Any suggestions?

[emersion]

I guess the dependency wasn't explicit because base system packages depend on pcre v1, so we got it "by chance". We need to make the pcre v2 dep explicit in .builds/*.yml.

[emersion]

Overall the code looks good to me!

[bl4ckb0ne]

The package seems to have a different name on alpine. Maybe drop the suffix after the 2?

$ apk search libpcre2
libpcre2-32-10.39-r0
libpcre2-16-10.39-r0
pcre2-dev-10.39-r0
pcre2-10.39-r0

[ndren]

Thank you, now it's building.

[emersion]

Thanks!