Update print/cups to cups-2.2.2

Changes:
2.2.2
-----
- Fixed some issues with the Zebra ZPL printer driver (Issue #4898)
- Fixed some issues with IPP Everywhere printer support (Issue #4893,
  Issue #4909, Issue #4916, Issue #4921, Issue #4923, Issue #4932,
  Issue #4933, Issue #4938)
- The rastertopwg filter could crash with certain input (Issue #4942)
- Optimized connection usage in the IPP backend
  (<rdar://problem/29547323>)
- The scheduler did not detect when an encrypted connection was closed
  by the client on Linux (Issue #4901)
- The cups-lpd program did not catch all legacy usage of ISO-8859-1
  (Issue #4899)
- Fixed builds on systems without a working poll() implementation
  (Issue #4905)
- Added a USB quirk rule for the Kyocera Ecosys P6026cdn (Issue #4900)
- The scheduler no longer creates log files on startup
  (<rdar://problem/28332470>)
- The ippContainsString function now uses case-insensitive comparisons
  for mimeMediaType, name, and text values in conformance with RFC 2911.
- The network backends now log the addresses that were found for a
  printer (<rdar://problem/29268474>)
- Let's Encrypt certificates did not work when the hostname contained
  uppercase letters (Issue #4919)
- Fixed reporting of printed pages in the web interface (Issue #4924)
- Updated systemd config files (Issue #4935)
- Updated documentation (PR #4896)
- Updated localizations (PR #4894, PR #4895, PR #4904, PR #4908,
  Issue #4946)
- Updated packaging files (Issue #4940)

(leot)