Fix regression in new PDF code
bb#10731 - Allow to specificy a group for the socket of which the user is not a member
Add ChangeLog entry
Pass in a NULL to cli_scanraw when the cache is disabled, thereby causing lazy generation of the MD5 hash of the sample
Add proof-of-concept XDP support.

This feature requires libxml2 support. This commit bumps FLEVEL and
introduces a new filetype based on the expected XML namespace for XDP
files.
Plug a memory leak
Adjust the XDP filetyping.
Dump the XDP payload if keeptemps is enabled.
Add XDP-related files to the Windows project and fix the Windows build.
Plug a memory and fd leak if keeptemps is enabled