v8.6.11

Changelog

50aa24d bump 8.6.11
757ed18 update deps
0b76edc update deps
fb2723d don't show description if only sending one file
6e9156d Merge pull request #337 from alrs/alrs-fix-server-nil-salt-and-keys
cd6d9a5 Merge pull request #338 from alrs/alrs-fix-client-swallowed-errs
3e5b876 src/croc: fix dropped errors
a9487a3 src/tcp: fix dropped errors