Log Message:
Updated to latest release, 1.8.6. Added BUILDLINK_ABI_DEPEND for avahi.
>From ChangeLog:

from 1.8.5 to 1.8.6
- fixed missing resolv.h detect for some cases
- srv resolver now can have plugins too

from 1.8.4 to 1.8.5
- more complete work on srv class
- route no longer static member of srv
- new resolver used in plugins

from 1.8.3 to 1.8.4
- eliminated libruli, integrate libresolv based srv resolver

from 1.8.2 to 1.8.3
- remote message routing
- faster reg cleanup for short time interval registrations
- management of digests changed and moved to server

from 1.8.1 to 1.8.2
- lots of voip type casting fixes
- context aware stack, call, and message options complete
- removed api splint macros!

from 1.8.0 to 1.8.1
- expose stack contexts directly to plugins
- plugins can call voip api directly, no need for redirection api
- call sessions now have contexts
- invites now use contexts

from 1.7.2 to 1.8.0
- startup and shutdown multi-context aware for v4 api
- registration cycle now v4 api protocol context aware

from 1.7.1 to 1.7.2
- modernized autoconf support

from 1.7.0 to 1.7.1
- smarter support of remote routing
- srv resolver plugin for use with libruli

from 1.6.1 to 1.7.0
- reconfiguration of exosip2 support into runtime library