Validator: do not complain about missing segregated if bicycle=dismount

[Famlam]

What steps will reproduce the problem?

1. Validate attached file (part of Nijmegen, NL)

What is the expected result?

No warnings

What happens instead?

10x a warning about a missing tag for a combined foot and cycleway: segregated

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

Some people tag footways as bicycle=dismount, in order to allow routing by dismounted bicycles over footways. (Personally I think that's unnecessary, but that's my opinion).

It is highly unlikely that there'll be a case where a way has separate paths for pedestrians and dismounted cyclists, so nearly always this case refers to walking paths.

(n.b. somewhat related: perhaps segregated can also not be enforced if sidewalk=right/both/left, or an automatic fix can be provided to set segregated to yes if sidewalk=right/both/left is encountered on a cycleway)

URL:https://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2019-11-01 23:59:01 +0100 (Fri, 01 Nov 2019)
Build-Date:2019-11-01 22:59:57
Revision:15492
Relative:URL: ^/trunk

Identification: JOSM/1.5 (15492 nl) Windows 10 64-Bit
OS Build number: Windows 10 Home 1903 (18362)
Memory Usage: 983 MB / 1820 MB (817 MB allocated, but free)
Java version: 1.8.0_231-b11, Oracle Corporation, Java HotSpot(TM) 64-Bit Server VM
Screen: \Display0 1920x1080
Maximum Screen Size: 1920x1080
Dataset consistency test: No problems found

Plugins:
+ OpeningHoursEditor (34977)
+ changeset-viewer (22)
+ imagery_offset_db (34908)
+ tageditor (34977)
+ turnlanes-tagging (281)
+ utilsplugin2 (35177)

Map paint styles:
- https://josm.openstreetmap.de/josmfile?page=Styles/Lane_and_Road_Attributes&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/PublicTransport&zip=1

Last errors/warnings:
- W: No configuration settings found.  Using hardcoded default values for all pools.

[Famlam]

Example file with highway=footway and bicycle=dismount

[Klumbumbus]

I too think that tagging highway=footway + bicycle=dismount for simple footways is not such a good idea, but the warning makes no sense as well.

[Klumbumbus]

In 15524/josm:

see #17973, fix #18331 - don't warn about missing segregated if bicycle=dismount is used