httpd.c: GET /.well-known/ now returns an HTML list of well-known URLs
httpd.c: allow range requests for list_well_known()
http_timezone.c: include "truncated" object in capabilities response per draft-douglass-timezone-service-09
http_caldav.c: don't leak busytime array in report_cal_query() (found by Valgrind)
annotate.c: use a struct buf to construct db data for writing rather than a fixed-length buffer (limited annotation values to 4088 bytes )
http_timezone.c: added support for "truncate" parameter
ctl_zoneinfo.c: added ctl_zoneinfo tool to rebuild zoneinfo.db from <configdir>/zoneinfo/ directory
http_timezone.c: create a tombstone component (if necessary) at the truncation point