setup 2.891release candidate - please test

[Jon Turney <jon.turney@dronecode.org.uk>]

A new setup release candidate is available at:

   https://cygwin.com/setup/setup-2.891.x86_64.exe (64 bit version)
   https://cygwin.com/setup/setup-2.891.x86.exe    (32 bit version)

Please test and report any problems here.

This is not the place for setup feature requests.

Changes compared to 2.889:

- 'Use HTTP/FTP Proxy' connection type now uses the WinINet API

As a consequence, the '--user-agent' option now affects this connection 
type as well

- Remove the 'Direct(legacy)' connection type and associated cruft

There have been no reported problems with it's replacement, the 'Direct' 
connection type, since it's introduction in 2.878
(See https://cygwin.com/ml/cygwin-announce/2017-05/msg00053.html)

If this is the currently configured connection type, it will be silently 
migrated to 'Direct'

- Improve file:// URL handling

All well-formed file URLs should now work.  Malformed file URLs we 
previously accepted should also still work.

Thanks to SZAVAI Gyula for these changes.

- Various fixes for regressions in 'Install from Local Directory' mode
   Addresses: https://cygwin.com/ml/cygwin/2018-03/msg00027.html

Thanks to Ken Brown for these changes.

- Add support for setup-minimum-version: in setup.ini

- Preliminary support for 'provides:' and 'conflicts': in setup.ini

- Add a --version option

--
Problem reports:       http://cygwin.com/problems.html
FAQ:                   http://cygwin.com/faq/
Documentation:         http://cygwin.com/docs.html
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple