Alias the aggregate columns so SQL Server doesn't combine them.
Compare dirname() results to DIRECTORY_SEPARATOR, not '/'
Revert "use relative paths to create images from a file. This way it also works if"

This reverts commit 3488f0b77a2d03747bf20b5d870639cb40440083.
Return plausible isReadable() default impl for ext storage

When an ext storage doesn't implement isReadable(), always returning
true made the file scanner believe that the file exists and creates a
cache entry with the size zero.

This fix makes the default impl of isReadable() use file_exists().

Fixes #5940
Moved default isReadable/isUpdatable impl into Common class

Also adjusted all ext storage backends to not override these when the
default behavior is expected.
[tx-robot] updated from transifex
Merge pull request #5995 from owncloud/extstorage-isreadablefix

Return plausible isReadable() default impl for ext storage
fix overwrite host support and make the code a bit more readable
update PHPDoc
adding simple unit test to test scriptName() under overwrite condition
Merge pull request #6018 from owncloud/fix_overwritehost

fix overwrite host support and make the code a bit more readable
Merge pull request #5874 from owncloud/fix-5845

Fix file uploads on Windows with SQL Server
Merge branch 'master' into fix-5388-master