cryptsetup: add documentation for keyfile-timeout
(cherry picked from commit 4e1334512debb27f4a0c4a6da237a4b8d59fea08)
Related: #1763155
patch_name: 0298-cryptsetup-add-documentation-for-keyfile-timeout.patch
present_in_specfile: true
location_in_specfile: 298
squash_commits: true