vcf: prevent segfault when sample columns do not exist but FORMAT column does
Merge branch 'develop' of github.com:samtools/htslib into develop
Merge branch 'develop' of github.com:samtools/htslib into develop
synced_reader: Expanded docs - example of usage
vcf: Support for string values in FORMAT; handling missing BCF_BT_CHAR values in bcf_fmt_array()
VCF header parsing: Handle pathological cases where less-than and greater-than signs are used in place of double quotes