Log Message:
www/davical update to 1.1.6

From upstream's changelog:

>From the Release Notes
(https://wiki.davical.org/index.php/Release_Notes/1.1.6):

Bug Fixes
=========
 * Only one set of angle brackets around cannot-modify-protected-property error \ 
tag (#112)
 * Fix sync of deleted events when hide_todo is set (#100)
 * Modify hide_older_than logic to allow through recurring events (#103)
 * Fix modified mapping in the LDAP driver (#108)
 * Do not output unescaped XML special characters in if-match error message (#113)
 * Don't crash on principal-property-search REPORT without a proper match clause \ 
(#114)
 * Various CardDAV and CalDAV fixes highlighted by caldav-tester
 * Fix $SERVER variable names used when operating behind a proxy (!38)
 * Use modern class constructors that even work with PHP7 (fixes: #119)
 * Card search invalid when negate-condition="no" (#126)
 * Propagate database error to client (#127)
 * Add a log entry for login failures (#105)

Other Changes
=============
 * Updates to the test suites, which are mostly passing now
 * Improved logging in certain error conditions
 * Set $c->external_ua_string to fetch external calendars posing as a certain \ 
user-agent (#115)
 * Improve parsing of RFC5545 durations
 * Improve support for /principals/users/..., /principals/resources/...
   and /__uids__/... URLs
 * Improve use of create-database.sh and update-davical-database with \ 
non-default values (see #124)
 * Experimental $c->enable_attendee_group_resolution will resolve
   attendee group names to a list of individual users (from !21)
 * Add support for calendar-user-type (!39)
 * Update caldav_functions.sql for Postgresql 10 (#129)

Database Upgrade
================
 * Run dba/upgrade-davical-database to get Postgresql-10-compatible functions

Upgrades of Other Software
==========================
 * AWL 0.58 is required for best PHP7 compatibility