Name: httpcontentmd5
Type: SWITCH
Default-Value: 0
Last-Modified: 2.5.0

If enabled, HTTP responses will include a Content-MD5 header for the
purpose of providing an end-to-end message integrity check (MIC) of the
payload body.  Note that enabling this option will use additional CPU to
generate the MD5 digest, which may be ignored by clients anyways.
