IDMAP: Add support for automatic adding of ranges Resolves: https://fedorahosted.org/sssd/ticket/2188 Reviewed-by: Sumit Bose <sbose@redhat.com>

libsss_idmap: function to calculate range Calculation of range for domains is moved from sdap_idmap code to sss_idmap code. Some refactoring have been done to allow this move. https://fedorahosted.org/sssd/ticket/1844

sss_idmap: add support for samba struct dom_sid The samba ndr libraries use struct dom_sid to handle SIDs. Since there is no public samba library which offers conversion from other representations, e.g. as string, this is added to libsss_idmap. To avoid compile-time or run-time dependency to any samba library or header file the definition of the struct is copied here.

Allow different SID representations in libidmap Besides as strings it is now possible to use binary SIDs or a struct containing all SID information. Functions to convert between these formats are added as well.