(maint) update configure.markdown to mention effect os setting ttls to 0s
(maint) update configure.markdown to mention effect os setting ttls to 0s

waynr/puppetdb,senior/puppetdb,waynr/puppetdb,rbrw/puppetdb,senior/puppetdb,rbrw/puppetdb,mullr/puppetdb,mullr/puppetdb,rbrw/puppetdb,puppetlabs/puppetdb,senior/puppetdb,rbrw/puppetdb,mullr/puppetdb,puppetlabs/puppetdb,waynr/puppetdb,senior/puppetdb,waynr/puppetdb,rbrw/puppetdb,mullr/puppetdb,puppetlabs/puppetdb,puppetlabs/puppetdb,mullr/puppetdb,puppetlabs/puppetdb