sssctl: use internal API to remove files Reviewed-by: Petr Cech <pcech@redhat.com>

sssctl: Generic help for cache-upgrade and config-check sssctl COMMAND --help should print at least generic help, even if the command does not accept any command specific options. Resolves: https://fedorahosted.org/sssd/ticket/3086 Reviewed-by: Pavel Březina <pbrezina@redhat.com>

sssctl: Consistent commands naming Use TOPIC-ACTION pattern for sssctl command names. Resolves: https://fedorahosted.org/sssd/ticket/3087 Reviewed-by: Pavel Březina <pbrezina@redhat.com> Reviewed-by: Lukáš Slebodník <lslebodn@redhat.com>

TOOLS: Add the upgrade-cache command Allows to upgrade the cache using the sssctl tool, which might be useful e.g. in RPM %post scripts. Reviewed-by: Sumit Bose <sbose@redhat.com>

sssctl: remove also ccache Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>

sssctl: restart SSSD when removing cache Resolves: https://fedorahosted.org/sssd/ticket/3066 Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>

sssctl: new tool Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>