Used to capture packets by the `dns' plugin.
<http://www.tcpdump.org/>
- * libpcre (optional)
- Used by the `filter_pcre' plugin.
- <http://www.pcre.org/>
-
* libperl (optional)
Obviously used by the `perl' plugin. The library has to be compiled with
ithread support (introduced in Perl 5.6.0).