Fix deleting folders when using s3 external storage

[icewind1991]

Fixes#7667

[MorrisJobke]

@wildlifechorus@schnaser@Flandoll Please help testing this :)

[codecov]

Codecov Report

Merging #8100 into master will decrease coverage by <.01%.
The diff coverage is 0%.

@@ Coverage Diff @@## master #8100 +/- ##
===========================================
- Coverage 51.7% 51.7% -0.01% - Complexity 25427 25428 +1 
===========================================
Files 1598 1598 Lines 95239 95242 +3 Branches 1376 1376 ===========================================
Hits 49244 49244 - Misses 45995 45998 +3

Impacted Files	Coverage Δ	Complexity Δ
apps/files_external/lib/Lib/Storage/AmazonS3.php	0% <0%> (ø)	111 <0> (+1)	⬆️
lib/private/Server.php	85.24% <0%> (-0.1%)	281% <0%> (ø)
lib/private/Security/CertificateManager.php	92% <0%> (+1%)	39% <0%> (ø)	⬇️

[rullzer]

Makes sense

[MorrisJobke]

I guess this needs to be backported tos table12/13?

[Disco1]

I'm having the same issue. Trying to delete certain files and folders from S3 causes an error "unable to delete". There is nothing in the nextcloud.log that points to anything of interest. I have verified that the attached fix patch has been applied to my instance (newly downloaded). Any ideas?

[kesselb]

@Disco1 would you mind to create a issue report https://github.com/nextcloud/server/issues/new?labels=bug%2C+0.+Needs+triage&template=Bug_report.md for this? This pull request is not the right place.