SSSCTL: Replace sss_debuglevel with shell wrapper
The sss_debuglevel binary is replaced by a shell wrapper calling
sssctl debug-level as part of merging sss_debuglevel into sssctl.
The wrapper will redirect sss_debuglevel to the sssctl debug-level
command performing the same task. The sss_debuglevel(8) man page is
updated to indicate that sss_debuglevel is deprecated and functionality
exists now in sssctl.
Reviewed-by: Lukáš Slebodník <lslebodn@redhat.com>
Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>
Reviewed-by: Michal Židek <mzidek@redhat.com>