util: move string_in_list to util_ext To be able to include string_in_list() without additional dependencies it is moved into a separate file. Related to https://pagure.io/SSSD/sssd/issue/3050 Reviewed-by: Jakub Hrozek <jhrozek@redhat.com> Reviewed-by: Lukáš Slebodník <lslebodn@redhat.com>

split_on_separator: move to a separate file To be able to include split_on_separator() without additional dependencies (only talloc), it is moved into a separate file. Related to https://pagure.io/SSSD/sssd/issue/3050 Reviewed-by: Jakub Hrozek <jhrozek@redhat.com> Reviewed-by: Lukáš Slebodník <lslebodn@redhat.com>