Added additional methods for removal of sensitive info

[Fiech]

As per #6576

I'm unable to recreate the issue with the current server code, but the changes do not break the installation.

Edit by @MorrisJobke: closes #6576

[MorrisJobke]

Makes sense 👍

[MorrisJobke]

@Fiech Could I ask you to add the sign-off message to this commit (then our CI also succeeds): See https://github.com/nextcloud/server/blob/master/CONTRIBUTING.md#sign-your-work for the why.

This should be possible by doing this:

git commit --amend -s
git push -f origin master

Thanks for your contribution

[codecov]

Codecov Report

Merging #6977 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master    #6977   +/-   ##
=========================================
  Coverage     52.82%   52.82%           
  Complexity    22802    22802           
=========================================
  Files          1442     1442           
  Lines         88562    88562           
  Branches       1349     1349           
=========================================
  Hits          46782    46782           
  Misses        41780    41780

Impacted Files	Coverage Δ	Complexity Δ
lib/private/Log.php	79.31% <ø> (ø)	38 <0> (ø)	⬇️
lib/private/Security/CertificateManager.php	91.08% <0%> (-1%)	39% <0%> (ø)
lib/private/Server.php	83.59% <0%> (+0.12%)	124% <0%> (ø)	⬇️

[Fiech]

Hey, just signed off my commit. Awesome, that everything is triggered automatically!

[nickvergessen]

Added some unit tests in #6981

Thanks!