libipa_hbac: Ensure we always build with C90 libipa_hbac is also used by external projects such as pam_hbac: https://github.com/jhrozek/pam_hbac In order to make sure we don't use C99 features in the libipa_hbac code in the future, this patch adds an explicit -std=c89 flag to CFLAGS. Signed-off-by: Jakub Hrozek <jhrozek@redhat.com> Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>

UTIL: Hide implementation details about unicode libraries. Header files from glib or unistring are only necessary in implementation module sss_utf8.c Reviewed-by: Pavel Reichl <preichl@redhat.com>

sss_utf8_tolower utility function+unit tests

Allow using Glib for UTF8 support