sudo: Update to version 1.9.15p5

sudo: Update to version 1.9.15p5

- Update from version 1.9.15p4 to 1.9.15p5
- Update of rootfile not required
- Changelog
    1.9.15p5
	    Fixed evaluation of the lecture, listpw, verifypw, and fdexec sudoers Defaults
	     settings when used without an explicit value. Previously, if specified
	     without a value they were evaluated as boolean false, even when the negation
	     operator (’!’) was not present.
	    Fixed a bug introduced in sudo 1.9.14 that prevented LDAP netgroup queries
	     using the NETGROUP_BASE setting from being performed.
	    Sudo will now transparently rename a user’s lecture file from the older
	     name-based path to the newer user-ID-based path. GitHub issue #342.
	    Fixed a bug introduced in sudo 1.9.15 that could cause a memory allocation
	     failure if sysconf(_SC_LOGIN_NAME_MAX) fails. Bug #1066

Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
Reviewed-by: Peter Müller <peter.mueller@ipfire.org>