One cannot simply pass down a va_list to another function that expects
variable arguments ("..."). The prototype of the called functions must
expect a va_list argument instead.

This fixes segfaults that happen e.g. after compiling X11.cpp with
TEST and effectively reverts 59e829f3.

nxcompshad: Rewrite Logger class methods to properly take advantage of the 'gnu_printf' format attribute.

Per-file copyright notices: Update copyright information in file headers that NoMachine placed there own copyright statement in.

Summary: Imported nxcompshad-3.5.0-2.tar.gz
Keywords:

Imported nxcompshad-3.5.0-2.tar.gz
into Git repository

Summary: Imported nxcompshad-3.4.0-3.tar.gz
Keywords:

Imported nxcompshad-3.4.0-3.tar.gz
into Git repository

Summary: Imported nxcompshad-3.1.0-2.tar.gz
Keywords:

Imported nxcompshad-3.1.0-2.tar.gz
into Git repository