complain about cycleway=opposite_lane, cycleway=opposite without oneway=yes

[mkoniecz]

What steps will reproduce the problem?

1. Create highway=residential noname=yes cycleway=opposite line
2. Run validator

What is the expected result?

Validator complains that either cycleway=opposite should be deleted or oneway=yes added as cycleway=opposite makes sense only for oneway roads.

What happens instead?

Nothing.

Please provide any additional information below. Attach a screenshot if possible.

Inspired by mailing list discussion on tagging.

It may be worth complaining also for cycleway:left, cycleway:right, cycleway:both

See ​http://overpass-turbo.eu/s/H97

URL:https://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2019-03-19 01:06:07 +0100 (Tue, 19 Mar 2019)
Build-Date:2019-03-19 02:30:51
Revision:14904
Relative:URL: ^/trunk

Identification: JOSM/1.5 (14904 en) Linux Ubuntu 16.04.6 LTS
Memory Usage: 548 MB / 869 MB (217 MB allocated, but free)
Java version: 1.8.0_201-b09, Oracle Corporation, Java HotSpot(TM) 64-Bit Server VM
Screen: :0.0 1920x1080
Maximum Screen Size: 1920x1080
Dataset consistency test: No problems found

Plugins:
+ OpeningHoursEditor (34867)
+ buildings_tools (34904)
+ continuosDownload (82)
+ imagery_offset_db (34867)
+ measurement (34867)
+ reverter (34917)
+ todo (30306)

Validator rules:
+ ${HOME}/Desktop/tmp/unnecessary.validator.mapcss

Last errors/warnings:
- W: java.io.IOException: Attribution is not loaded yet
- W: java.io.IOException: Attribution is not loaded yet
- W: java.io.IOException: Attribution is not loaded yet
- W: java.io.IOException: Attribution is not loaded yet
- W: java.io.IOException: Attribution is not loaded yet
- W: java.io.IOException: Attribution is not loaded yet
- W: java.io.IOException: Attribution is not loaded yet
- W: java.io.IOException: Attribution is not loaded yet
- W: java.io.IOException: Attribution is not loaded yet
- W: java.io.IOException: Attribution is not loaded yet

[mkoniecz]

I am considering working on it, so if anyone thinks that idea proposed here is fundamentally flawed it would be a good moment to comment.

I plan to make check similar to one done for power line nodes touching mixed with non-power objects.

[skyper]

See also #9296.