gp_inf: Parse the GptTmpl.inf file which stores security settings

gp_inf: Parse the GptTmpl.inf file which stores security settings

This is NOT an ini file and CANNOT be parsed by Python ConfigParser
without losing information (it would likely eat meaningful whitespace
and so should not be done).

There are three main types of settings:

 * Name,Mode,ACL
 * key = value
 * registry key and value

   Note: This appears as key=value, but registry keys in the general
   case may have = in their names, so we record the entire string in
   order to be as safe as possible.

Signed-off-by: Garming Sam <garming@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>