Restore support for QNAMEs longer than 251 characters#900

Merged

daviesrob merged 2 commits intosamtools:developfrom

jmarshall:qname-upto-254

Jul 30, 2019

Commits on Jul 24, 2019

Enlarge bam1_core_t::l_qname to allow values 0..256 inclusive
jmarshall
committed

Commits on Jul 26, 2019

In bam_write1(), check QNAME <= 254 characters
jmarshall
committed