Duration item

timerange fields

Moste option like enable, or enable_pager accept at timerange value.

# -------------------------------------
# timerange fields (from documentation)
# -------------------------------------
# yes, 24/7                    : always
# no                           : never
# after YYYY-MM-DD hh:mm:ss    : after date and time
# before YYYY-MM-DD hh:mm:ss   : before ... 
# hrange hh:mm:ss hh:mm:ss     : time intervall
# ho, bh, business_hours       : 8h30/18h mon>fri - see global configuration for custom time
# nbh,hno, non_business_hours  : !(8h30/18h mon>fri)