[fix] dedicated named location per $app

[Gofannon]

fix multiple install on subdomains

Before this fix app1 => @dokuwiki - works app2 => @dokuwiki - fails

After \o/ app1 => @app1 - works app2 => @app2 - works

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Problem

• Activating "URL rewriting" broke multiple install on subfolders
• All dokuwiki apps send their data to the same named location @dokuwiki
  • there can only be one functionnal instance per domain

Solution

• Create a dedicated named location per DokuWiki installation

Test

On the same domain (root or subdomain), install

1. https://myDomain/dokuwiki1
2. https://myDomain/dokuwiki2

Visit https://myDomain/dokuwiki2 and go to another page than $home (like $admin or create a $new page)

PR Status

• [X] Code finished.
• [ ] Tested with Package_check.
• [X] Fix or enhancement tested.
• [x] Upgrade from last version tested.
• [x] Can be reviewed and tested.

Validation

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Minor decision

• Upgrade previous version :
• [x] Code review : Kay0u
• [x] Approval (LGTM) : Kay0u
• [ ] Approval (LGTM) :
• CI succeeded :

When the PR is marked as ready to merge, you have to wait for 3 days before really merging it.

[Gofannon]

Tested on my server

• root domain : wiki.example.org
  • upgrade to this PR : OK
• install subdomains
  • example.org/toto : OK
  • example/titi : OK

Can be tested

[Gofannon]

Merging in testing as it's a production bug and some people cannot use DokuWiki anymore because of it