Show warning if slash is entered as filename

[MorrisJobke]

Fixes #6594 when creating or renaming a file.

[MariusBluem]

For now, fine 😉 But what do you think about creating a directory with that file when somebody types in "testfolder/testdoc.docx" as document name 🤔 @MorrisJobke

[MorrisJobke]

For now, fine 😉 But what do you think about creating a directory with that file when somebody types in "testfolder/testdoc.docx" as document name 🤔 @MorrisJobke

Something for later and also a bit over the top from my point of view.

[codecov]

Codecov Report

Merging #7676 into master will increase coverage by 0.01%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##             master   #7676      +/-   ##
===========================================
+ Coverage     51.19%   51.2%   +0.01%     
- Complexity    24888   24893       +5     
===========================================
  Files          1601    1602       +1     
  Lines         94781   94803      +22     
  Branches       1371    1372       +1     
===========================================
+ Hits          48523   48544      +21     
- Misses        46258   46259       +1

Impacted Files	Coverage Δ	Complexity Δ
.../dav/lib/Connector/Sabre/ExceptionLoggerPlugin.php	78.94% <ø> (ø)	6 <0> (ø)	⬇️
lib/private/Files/Cache/Propagator.php	94.93% <0%> (-1.27%)	16% <0%> (ø)
core/js/js.js	65.88% <0%> (ø)	0% <0%> (ø)	⬇️
lib/private/Template/JSConfigHelper.php	0% <0%> (ø)	18% <0%> (+1%)	⬆️
...leware/Security/PasswordConfirmationMiddleware.php	82.35% <0%> (ø)	6% <0%> (?)
...e/AppFramework/DependencyInjection/DIContainer.php	78.6% <0%> (+0.77%)	27% <0%> (ø)	⬇️
apps/files_trashbin/lib/Expiration.php	91.93% <0%> (+1.61%)	29% <0%> (ø)	⬇️
...amework/Middleware/Security/SecurityMiddleware.php	80.26% <0%> (+2.48%)	25% <0%> (-2%)	⬇️
...ware/Security/Exceptions/NotConfirmedException.php	100% <0%> (+100%)	1% <0%> (ø)	⬇️

[MorrisJobke]

The second commit fixes all the cases of #6594 (comment) and logs them as debug logs.

[skjnldsv]

Strange it was not already implemented! 🤔