dasdls: show various info from F1 DSCB
dasdls.c: finished?
dasdls.c: remove some C++isms
Documentation for dasdls enhancement

Adapted from Chris Cheney's Documentation, in the style of the
Hercules Operations and Utilities manual, which can be seen at
http://k9.bitbucket.org/hercules/dasdls.html
Merge branch 'dasdls-g3rse'