Checklist

• This is a bug report and not a different kind of issue
• I have read the contribution guidelines
• I have checked the list of open and recently closed bug reports
• I have checked the commit log of the master branch

Streamlink version

Latest stable release

Description

Hello.
First of all, I must say that I'm not a programmer, I'm, at most, tech savy, so forgive if I'm making something stupid or not seing the obvious. I also tried to google the issue, but I got no results.
Recently, my provider changed the url scheme and I'm unable to get the manifests/streams using Streamlink (I would like to note that there's no DRM involved whatsoever).

Previously, my provider had links with the following scheme, that worked great:
https://hostname/sdash/channel,token=XXXXXXXXXXXXXXXX/index.mpd?device=PC
But now they have the following scheme:
https://hostname/sdash/channel/index.mpd,token=XXXXXXXXXXXXXXXX/Manifest?device=PC

This seems to be some regex problem, because Streamlink gets the link up to .mpd and seems to discard the rest of the link (it gets the "https://hostname/sdash/channel/index.mpd", but discards the ",token=XXXXXXXXXXXXXXXX/Manifest?device=PC"), making it unable to get the manifest/stream.
If I open the same https://hostname/sdash/channel/index.mpd (without the rest of the link) in the browser, I get the same error code 400. Also, I piped the same links (https://hostname/sdash/channel/index.mpd,token=XXXXXXXXXXXXXXXX/Manifest?device=PC), with the same data, through ffmpeg and it's working.
I read the cli documentation and I did't see anything that could help me to solve this, so I'm reporting this possible issue.

Lastly, I would like to thank to all Streamlink contributers, because it's an amazing piece of software.

PS: I had to redact most of the link, because it contains personaly identifiable data. The streams are also geoblocked.

Debug log

[cli][debug] OS:         Linux-6.3.3-artix1-1-x86_64-with-glibc2.37
[cli][debug] Python:     3.11.3
[cli][debug] Streamlink: 5.5.1
[cli][debug] Dependencies:
[cli][debug]  certifi: 2023.5.7
[cli][debug]  isodate: 0.6.1
[cli][debug]  lxml: 4.9.2
[cli][debug]  pycountry: 22.3.5
[cli][debug]  pycryptodome: 3.18.0
[cli][debug]  PySocks: 1.7.1
[cli][debug]  requests: 2.28.2
[cli][debug]  urllib3: 1.26.15
[cli][debug]  websocket-client: 1.5.2
[cli][debug] Arguments:
[cli][debug]  url=https://hostname/sdash/channel/index.mpd,token=XXXXXXXXXXXXXXXX/Manifest?device=PC
[cli][debug]  --loglevel=debug
[cli][debug]  --logfile=/home/PC/log.log
[cli][debug]  --player=mpv
[cli][debug]  --http-header=[('User-Agent', 'PC')]
[cli][info] Found matching plugin dash for URL https://hostname/sdash/channel/index.mpd,token=XXXXXXXXXXXXXXXX/Manifest?device=PC
[plugins.dash][debug] URL=https://hostname/sdash/channel/index.mpd; params={}
error: Unable to open URL: https://hostname/sdash/channel/index.mpd (400 Client Error: Bad Request for url: https://hostname/sdash/channel/index.mpd)