#1530636: Exit event loop once all fwites() have been done; pick back up later on to do all freads().
#1905858: Print out bool's or null's multiple levels deep
#1909120: Ping DB every 20 seconds to keep DB connection open.
#1903844: Don't get locks for background processes until they are about to be used
The usage of httprl_build_url_self() has changed slightly. If you use this you need to set the Host header in the request as well; this is related to the bug fix in this release. The readme has several examples of setting the Host header.