sudo: Update to version 1.9.7p2

sudo: Update to version 1.9.7p2

- Update from 1.9.7p1 to 1.9.7p2
- Update of rootfile not required.
- Changelog - more details can be found at https://www.sudo.ws/changes.html
   Major changes between version 1.9.7p2 and 1.9.7p1:
     When formatting JSON output, octal numbers are now stored as strings, not numbers.
      The JSON spec does not actually support octal numbers with a 0 prefix.
     Fixed a compilation issue on Solaris 9.
     Sudo now can handle the getgroups() function returning a different number of groups
      for subsequent invocations. GitHub PR #106.
     When loading a Python plugin, python_plugin.so now verifies that the module loaded
      matches the one we tried to load. This allows sudo to display a more useful error
      message when trying to load a plugin with a name that conflicts with a Python
      module installed in the system location.
     Sudo no longer sets the the open files resource limit to unlimited while it runs.
      This avoids a problem where sudo's closefrom() emulation would need to close a
      very large number of descriptors on systems without a way to determine which ones
      are actually open.
     Sudo now includes a configure check for va_copy or __va_copy and only defines its
      own version if the configure test fails.
     Fixed a bug in sudo's utmp file handling which prevented old entries from being
      reused. As a result, the utmp (or utmpx) file was appended to unnecessarily.
      GitHub PR #107.
     Fixed a bug introduced in sudo 1.9.7 that prevented sudo_logsrvd from accepting TLS
      connections when OpenSSL is used. Bug #988.

Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
Signed-off-by: Arne Fitzenreiter <arne_f@ipfire.org>