How to make configure script look for gnutls3?

[Tony Zhou]

Hi,

I am trying to compile ocserv 0.3.2 under FreeBSD 10, and FreeBSD 10 
offers binary package named gnutls3 to provide libraries for gnutls 
3.12.  However, the configure script of ocserv keeps looking for 
gnutls.pc for pkg-config tool, but in FreeBSD it is located at 
/usr/local/libdata/pkg-config/gnutls3.pc instead of gnutls.pc, thus the 
script fails. What part of configure script should I change to make it 
look for gnutls3.pc?

Thanks,
TZ