libpsl library

[walkero-gr]

We need to port libpsl
https://github.com/rockdaboot/libpsl

[walkero-gr]

Created a fast port at
https://git.walkero.gr/walkero/libpsl/releases/tag/v0.21.2r1

newlib version is not included since I get the following errors

psl.c: In function ‘isip’:
psl.c:1605:25: error: storage size of ‘addr6’ isn’t known
 1605 |         struct in6_addr addr6;
      |                         ^~~~~
psl.c:1607:65: error: ‘AF_INET6’ undeclared (first use in this function); did you mean ‘AF_INET’?
 1607 |         return inet_pton(AF_INET, hostname, &addr) || inet_pton(AF_INET6, hostname, &addr6);
      |                                                                 ^~~~~~~~
      |                                                                 AF_INET
psl.c:1607:65: note: each undeclared identifier is reported only once for each function it appears in

Also, I had to disable the runtime, which uses the libicu, because of errors that need to be investigated further.