MFC r313953:

Import libucl 20170219

MFC r306544:

Import libucl 20160812

Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, as nothing has been merged
here.

Additional commits post-branch will follow.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Import libucl 0.8.0

Update libucl to latest git snapshot (20151027)

Update libucl to git version 8d3b186

Update libucl to latest version

While here correctly link libucl to libm and register the dependency on libm
for static building

Import libucl 0.4.0
Adapt pkg(7) to the new libucl API

Update to 20140321
This brings schema validation

MFC after: 1 week

Import libucl into head

UCL is heavily infused by nginx configuration as the example of a convenient
configuration system. However, UCL is fully compatible with JSON format and is
able to parse json files.

UCL is used by pkg(8) for its configuration file as well for the manifest format
in packages, it will be used in base for the pkg boostrap (signature checking
and configuration file parsing.)

libucl has been developped and is maintained by vsevolod@

Import libucl into vendor

UCL is heavily infused by nginx configuration as the example of a convenient
configuration system. However, UCL is fully compatible with JSON format and is
able to parse json files.

UCL is used by pkg(8) for its configuration file as well for the manifest format
in packages, it will be used in base for the pkg boostrap (signature checking
and configuration file parsing.)

libucl has been developped and is maintained by vsevolod@