Bug 420664

Dear KDE developers,

I seem to have found, what I would consider, a bug of plasma-pk-updates proxy handling:

SUMMARY

I recently moved a desktop computer from a network which requires a proxy to one which does not. For the proxy network, I set-up the proxy configuration using `kcmshell5 proxy` "use manually specified proxy configuration." This seems to write the proxy configuration to `.config/kioslaverc` setting 'ProxyType' to 1.

After moving the computer to the 'proxy-less' network I updated the proxy configuration to "None" and 'ProxyType' was set to '0' but all other settings in this file were kept (specifically the URLs are still pointing to the proxy). Programs like chromium based browser and other applications using the proxy configuration seem to work fine: With 'ProxyType=1' they are using the proxy (and complain about the Internet/proxy not being reachable in the proxy-less network) and with 'ProxyType=0' they ignore the rest of the proxy settings and connect to the Internet directly. 

Not so `plasma-pk-updates` which always complains about the proxy not being reachable.
> Download (curl) error for
> https://download.opensuse.org/repositories/KDE:/Applications/KDE_Frameworks5_openSUSE_Leap_15.1/repodata/repomd.xml':
Error code: Connection failed
Error message: Could not resolve proxy: proxy.domain.tld

I also tried to logout and even reboot the computer which doesn't have any effects.


STEPS TO REPRODUCE
1. Run `kcmshell proxy` to "use manually specified proxy configuration" (it doesn't matter if the proxy exists or not).
2. Run `kcmshell proxy` set proxy to "None" (make sure proxy URLs are still set in `config/kioslaverc`).
2a. maybe logout to be sure that `plasma-pk-updates` isn't using any 'outdated' proxy configuration.
3. run plasma-pk-updates


OBSERVED RESULT

Download (curl) error for 'https://download.opensuse.org/repositories/KDE:/Applications/KDE_Frameworks5_openSUSE_Leap_15.1/repodata/repomd.xml':
Error code: Connection failed
Error message: Could not resolve proxy: proxy.domain.tld


EXPECTED RESULT

plasma-pk-updates ignoring the proxy configuration if `ProxyType=0`.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: openSUSE with KDE installed from OBS
KDE Plasma Version: 5.18.4
KDE Frameworks Version: 5.69.0

ADDITIONAL INFORMATION

`plasma-pk-updates` works fine if the proxy URLs are 'blanked'/removed from `.config/kioslaverc` or if the files is removed completely.