The libevent API provides a mechanism to execute a callback function when a specific event occurs on a file descriptor or after a timeout has been reached. It is meant to replace the asynchronous event loop found in event-driven network servers.
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This release contains mostly reliability and portability fixes. Several problems on Solaris were fixed, the HTTP Server now includes a Date header by default, and several memory leaks in the HTTP and DNS layer were fixed.
Support for running a DNS server was added along with IPv6 name lookups and chunked transfer encoding for HTTP/1.1. A fix was provided for a DoS in the DNS system.