This is the v0.11.1.0 point release of the Monero software, and it is
part of the v0.11 mandatory update. The major release was due to the
September 15th hard fork, which in turn increased the minimum ring
signature size to 5 across the network, banned duplicate ring members in
a ring signature, and enforced the use of ringCT for all transaction
outputs. This release of the software presents a number of major
improvements to Monero, as well as a large set of bug fixes.
A GPG-signed list of the hashes is at https://getmonero.org/download...
and should be treated as canonical, with the signature checked against
the appropriate GPG key in the source code (in /utils/gpg_keys)