add a sane socket timeout so that the interface stays responsive with a slow or not working internet connection

use socket timeout of 10 sec to stay responsive even with a slow internet connection or a not working server

we are sharing the same file again if item_source of the already shared file and the newly shared file is the same. Therefore we can use the same target name

automatically remove and prevent installation of apps with a require version less than the current one. We check now the first ad second part of the version number.
Also increase the require tags of the core apps to 4.9 Please note that 4.9 is the internal versionnumber of the upcoming 4.5 release.
You have to pu a <require>4.9</require> into the info.xml of your app to make it as compatible with 4.5

fix create folder and upload file issue on win, fixes oc-1747, solution follows suggestion from bug tracker

We can't rely on the assumption that if the matching target is from the same owner that the share type will be different.
Files in different folders can have the same name. Therefore also a unique name has to be generated if the matching
target it from the same user. Also for folders and files with the same name a unique target name has to be generated

If matching target is from the same owner, use the same target. The share type will be different so this isn't the sa

update the filecache by setting mtimes to 0 when the mount configuration has changed instead of clearing the cache

mt_rand() is not secure from a cryptographic point of view, let's use openssl_random_pseudo_bytes() here

This token is completly useless since an attacker can easily extract it
from the page.

mt_rand() is not secure from a security point of view and predictable. Let's use openssl_random_pseudo_bytes() instead.

Before: 26 bits entropy
After: 72 bits entropy

Fix to preserve backward compatibility for apps creating static links containing the request token (currently the contacts app and maybe some 3rd party implementations)

etag has to be removed after version rollback to enable the sync client to detect the changes (bug #1829)