Unable to parse WMS layers list [patch]

[sarxos]

Whole problem with screenshots is described and fixed in a pull request I did against your Github mirror.

​https://github.com/openstreetmap/josm/pull/25

Thank you!

What steps will reproduce the problem?

1. Go to Imagery -> Imagery preferences.
2. Click "+WMS" button.
3. Use service URL ​http://wms.hgis.cartomatic.pl/topo/3857/m25k?service=WMS&request=GetCapabilities
4. Click Get Layers
5. Observe error.

What is the expected result?

Layers are imported from WMS service.

What happens instead?

Error stating that "Could not parse WMS layers list."

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

URL:https://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2018-03-26 22:16:39 +0200 (Mon, 26 Mar 2018)
Build-Date:2018-03-26 20:45:23
Revision:13576
Redirecting:to URL 'https://josm.openstreetmap.de/svn/trunk':
Relative:URL: ^/trunk

Identification: JOSM/1.5 (13576 en) Linux Ubuntu 14.04.5 LTS
Memory Usage: 1069 MB / 3499 MB (814 MB allocated, but free)
Java version: 1.8.0_171-b11, Oracle Corporation, Java HotSpot(TM) 64-Bit Server VM
Screen: :0.0 1920x1080, :0.1 1360x768, :0.2 1920x1080
Maximum Screen Size: 1920x1080
VM arguments: [-Djava.security.policy=file:${JAVA_HOME}/jre/lib/security/javaws.policy, -DtrustProxy=true, -Djnlpx.home=${JAVA_HOME}/jre/bin, -Djava.security.manager, -Djnlpx.origFilenameArg=${HOME}/.java/deployment/cache/6.0/56/1ee8cfb8-11d00449, -Djnlpx.remove=false, -Dsun.awt.warmup=true, -Djava.util.Arrays.useLegacyMergeSort=true, -Djnlpx.splashport=37796, -Djnlp.application.href=https://josm.openstreetmap.de/download/josm.jnlp, -Djnlpx.jvm=${JAVA_HOME}/jre/bin/java]
Dataset consistency test: No problems found

Plugins:
+ PicLayer (34170)
+ buildings_tools (34109)
+ ejml (34126)
+ geotools (34125)
+ jts (34038)
+ log4j (34038)

Last errors/warnings:
- W: No configuration settings found.  Using hardcoded default values for all pools.
- E: java.net.MalformedURLException: unknown protocol: wms
- E: Could not parse WMS layer list. Incoming data:
- W: Unable to find supported projection for layer wms.hgis.cartomatic.pl: WIG Mapa Szczegółowa 1:25k. Using EPSG:3857.
- W: Unable to find supported projection for layer wms.hgis.cartomatic.pl: WIG Mapa Szczegółowa 1:25k. Using EPSG:3857.

[Don-vip]

In 13699/josm:

fix #16248 - fix parsing of XML namespace in WMS capabilities (patch by Bartosz Firyn, modified)

[Don-vip]

Thanks a lot for the patch!