define INFO AC & AN in pVCF headers
define INFO AC & AN in pVCF headers

GLnexus itself doesn't generate these fields, but they can be added by bcftools post-processing steps which won't add the header definitions automatically. It doesn't hurt to declare them in anticipation of that possibility.

dnanexus-rnd/GLnexus,dnanexus-rnd/GLnexus,dnanexus-rnd/GLnexus