ssl: Generalize cb_info option
ssl: Further error handling enhancments

follow up enhancments done in commit
e56167dd6ca8d37d26ea7f19933691a3bda41113

Make sure format_error return good strings. Replace confusing legacy atoms
with more descriptive atoms.
ssl: Prepare for R16B
ssl: Fatal close alert makes more sense than handshake failiure at econnaborted
Merge branch 'ia/ssl/econnaborted'

* ia/ssl/econnaborted:
  ssl: Fatal close alert makes more sense than handshake failiure at econnaborted
ssl: Add missing group clause and correct parameters to packet/7
ssl: Add missing option and links
Prepare release