• ggatel.8 currently doesn't mention the 'rescue' command and documents a non-existing 'attach' command instead.
• while here address a spelling error

PR: 199111
Differential Revision: https://reviews.freebsd.org/D2259
Submitted by: fk@fabiankeil.de
Obtained from: ElectroBSD
Approved by: wblock (mentor)
MFC after: 1 week