[xmlsec] New xmlsec 1.2.17 release

[Aleksey Sanin]

forbid any access to file system as it is done in the following
>>     commits:
>>
>>
>> http://git.gnome.org/browse/xmlsec/commit/?id=2d5eddcc4163ea050cf3a3a1a25452bb5124f780
>>      http://trac.webkit.org/changeset/79159
> in the commit the problem is fixed by using xsltSetDefaultSecurityPrefs.
> this sets the security prefs for the whole process (a global variable).
> ....
These are examples of how to fix the problem in the aplicaiton. The actual
change in xmlsec library itself is here

http://git.gnome.org/browse/xmlsec/commit/?id=35eaacde6093d6711339754fc2146341b8b9f5fa

Aleksey