Christian Ehrhardt authored Jan 16, 2020 and Andrea Bolognani committed Jan 17, 2020

Reported at build time by lintian:
manpage-section-mismatch usr/share/man/man8/virt-sanlock-cleanup.8.gz:3 8 != 1

And indeed the rst file says 1 while the makefile say 8:
 if WITH_SANLOCK
   manpages8_rst += manpages/virt-sanlock-cleanup.rst
 else ! WITH_SANLOCK

8 "System administration commands and daemons" seems to match, so fix
the rst file to match.

Signed-off-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Andrea Bolognani <abologna@redhat.com>