When extracting the VCF header, do not read the entire file
When extracting the VCF header, do not read the entire file

The awk command reads in the full file (checking every line whether it is a
header line). The sed command stops on the first non-header line.

szilvajuhos/CAW,marcelm/CAW,szilvajuhos/CAW,marcelm/CAW,marcelm/CAW,szilvajuhos/CAW