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

Bump copyrights

Add keep_tite configuration option

Similar to dialog(3) keep_tite option used to prevent visually disturbing
initialization or exit that could occur when run from a script using
dpv(3) by way of dpv(1) in sequence with other dialog(1) invocations.

Default to en_US.ISO8859-1 if no locale

MFC after: 3 days
X-MFC-to: stable/10

Fix a debug statement. Only the callback function (performing the
incrementing of dpv_overall_oread) knows what its purpose is (and
often times it was bytes, not lines).

MFC after: 3 days
X-MFC-to: stable/10

Make libdpv [dpv(3)] WARNS=6 clean for clang on -CURRENT.
NB: aka unbreak the build

Reviewed by: shurd
MFC after: 21 days
X-MFC-to: stable/10 stable/9
X-MFC-with: 274116 274120

Add new libraries/utilities for data throughput visualization.
dpv(3): dialog progress view library
dpv(1): stream data from stdin or multiple paths with dialog progress view
figpar(3): configuration file parsing library

Reviews: D714
Reviewed by: jelischer, shurd
Discussed at: MeetBSD California 2014 Vendor/Dev Summit
Discussed on: -current
MFC after: 21 days
X-MFC-to: stable/10 stable/9