MINOR: tools: modify hash_ipanon in order to use it in cli

MINOR: tools: modify hash_ipanon in order to use it in cli

Add a parameter hasport to return a simple hash or ipstring when
ipstring has no port. Doesn't hash if scramble is null. Add
option PA_O_PORT_RESOLVE to str2sa_range. Add a case UNIX.
Those modification permit to use hash_ipanon in cli section
in order to dump the same anonymization of address in the
configuration file and with CLI.

No backport needed, except if anonymization mechanism is backported.