https://fedorahosted.org/sssd/ticket/1589

Added check for determining, whether database version is higher or
lower than expected. To distinguish it from other errors it uses
following retun values (further used for appropriate error message):
EMEDIUMTYPE for lower version than expected
EUCLEAN for higher version than expected

When SSSD or one of it's tools fails on DB version mismatch, new error
message is showed suggesting how to proceed.

https://fedorahosted.org/sssd/ticket/1584

When working with multiple domains and no
matching objects for deletion were found in the first
domain, the other domains were not searched at all.

Also the ERROR message informing about object not found
(the one printed for each domain) was changed to
DEBUG message.

Removing bad examples of usage of sysdb_transaction_start/commit/end
functions and making it more consistent (all files except of
src/db/sysdb_*.c).

https://fedorahosted.org/sssd/ticket/1336

* Print usage when no options are given
* Report skipped entries
* Print error message when a nonexistent domain is selected

https://fedorahosted.org/sssd/ticket/1301
https://fedorahosted.org/sssd/ticket/1305
https://fedorahosted.org/sssd/ticket/1306

https://fedorahosted.org/sssd/ticket/1170

Removed:
    SSS_UNRESOLVED_DEBUG_LEVEL (completely replaced with SSSDBG_UNRESOLVED)

Added new macro:
    CONVERT_AND_SET_DEBUG_LEVEL(new_value)

Changes unresolved debug level value (SSSDBG_UNRESOLVED) from -1 to 0
so DEBUG macro could be reduced by one condition. Anyway, it has a minor
effect, every time you want to load debug_level from command line parameters,
you have to use following pattern:

    /* Set debug level to invalid value so we can deside if -d 0 was used. */
    debug_level = SSSDBG_INVALID;

    pc = poptGetContext(argv[0], argc, argv, long_options, 0);
    while((opt = poptGetNextOpt(pc)) != -1) { ... }

    CONVERT_AND_SET_DEBUG_LEVEL(debug_level);