sss_ini: Small refacoring of sss_ini_call_validators Separate logic to fill errobj so that the errors can be printed by the caller. Reviewed-by: Lukáš Slebodník <lslebodn@redhat.com>

confdb: Check for config file errors on sssd startup Resolves: https://fedorahosted.org/sssd/ticket/2028 Signed-off-by: Lukas Slebodnik <lslebodn@redhat.com> Reviewed-by: Lukáš Slebodník <lslebodn@redhat.com> Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>

confdb: Make it possible to use config snippets Resolves: https://fedorahosted.org/sssd/ticket/2247 Signed-off-by: Lukas Slebodnik <lslebodn@redhat.com> Reviewed-by: Lukáš Slebodník <lslebodn@redhat.com> Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>

DB: Switch to new libini_config API https://fedorahosted.org/sssd/ticket/1786 Since we need to support the old interface as well, the configure scritp is modified and correct ini interface is chosen.