install-http.html: updated with Timezone Service configuration/administration info
specs.html: added draft-douglass-timezone-service
changes.html: updated
changes.html: more updates
getting ready for 2.4.17-caldav-beta8
http_ischedule.c: return 401 rather than 404 for GET with missing/incorrect query param
xcal.[ch], configure.in: allow us to use libxml2 < 2.7.3
xcal.[ch], configure.in: better/simpler checks for libxml2 versions < 2.8.0
install.html: added TZ servuce to list of HTTP modules
changes.html: updated
http*.c: Fixed bug parsing Accept header (now accepts */* and <type>/*)
httpd.c: reset request and response body payload buffers before each transaction (prevents garbage from ending up in telemetry log)
http_caldav.c: Added a workaround for the DELETE bug in MacOS X 10.9.0 Calendar client
Read for 2.4.17-caldav-beta9
http_caldav.c: Split merging of scheduling object resources from sched_deliver_local() into deliver_merge_request() and deliver_merge_reply()
caldav_scheduling_flowchart.html: begin to document CalDAV scheduling ops for my own sanity
changes.html: updated
caldav_scheduling_flowchart.html: added brief descriptions of each function
caldav_scheduling_flowchart.html: added <meta> tag
Revert "caldav_scheduling_flowchart.html: added <meta> tag"

This reverts commit 9342ed5f5441fdf7c82ba104a0cef12e572d2866.