Do not redirect if requested font, style or script can not be found

[ChristophWurst]

If a page in Nextcloud requests a font, stylesheet or script that doesn't exist we currently redirect to the default page. This comes with the following consequences

• The redirect causes one additional HTTP request per page load
• The request to the default page causes server load
• The requested default page causes traffic
• The browser requests a font, CSS or JavaScript and gets HTML. This causes a parsing error, e.g. The stylesheet https://localhost/apps/dashboard/ was not loaded because its MIME type, “text/html”, is not “text/css”.

User routing is not affected by this. If you navigate to <domain>/apps/phpmymailapp Nextcloud still redirects to the default page. That behavior is desired.

Tested with FF and Chromium.

Ref https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Sec-Fetch-Dest

[github-actions]

Possible performance regression detected

Show Output

1 queries added

≠ /remote.php/dav/files/test with 1 queries removed
  - UPDATE "oc_preferences" SET "configvalue" = :dcValue1 WHERE ("userid" = :dcValue2) AND ("appid" = :dcValue3) AND ("configkey" = :dcValue4)
= /remote.php/dav/files/test/test.txt
≠ /remote.php/dav/files/test/many_files with 1 queries added
  + UPDATE "oc_preferences" SET "configvalue" = :dcValue1 WHERE ("userid" = :dcValue2) AND ("appid" = :dcValue3) AND ("configkey" = :dcValue4)
= /remote.php/dav/files/test/new_file.txt
≠ /remote.php/dav/files/test/new_file.txt with 1 queries added
  + UPDATE "oc_preferences" SET "configvalue" = :dcValue1 WHERE ("userid" = :dcValue2) AND ("appid" = :dcValue3) AND ("configkey" = :dcValue4)

[github-actions]

Possible performance regression detected

Show Output

1 queries added

= /remote.php/dav/files/test
≠ /remote.php/dav/files/test/test.txt with 1 queries removed
  - UPDATE "oc_preferences" SET "configvalue" = :dcValue1 WHERE ("userid" = :dcValue2) AND ("appid" = :dcValue3) AND ("configkey" = :dcValue4)
≠ /remote.php/dav/files/test/many_files with 1 queries added
  + UPDATE "oc_preferences" SET "configvalue" = :dcValue1 WHERE ("userid" = :dcValue2) AND ("appid" = :dcValue3) AND ("configkey" = :dcValue4)
= /remote.php/dav/files/test/new_file.txt
≠ /remote.php/dav/files/test/new_file.txt with 1 queries added
  + UPDATE "oc_preferences" SET "configvalue" = :dcValue1 WHERE ("userid" = :dcValue2) AND ("appid" = :dcValue3) AND ("configkey" = :dcValue4)

[kesselb]

LGTM 👍

[PVince81]

@ChristophWurst please cleanup the commit history