CoAT: cmd_dump: Say it with a return statement

Signed-off-by: Toni Gundogdu <legatvs@gmail.com>
CoAT: cmd_get: Say it with a return statement

Signed-off-by: Toni Gundogdu <legatvs@gmail.com>
Add framework for handling SIGWINCH

Signed-off-by: Toni Gundogdu <legatvs@gmail.com>
quvi-dump: Setup SIGWINCH handler

Signed-off-by: Toni Gundogdu <legatvs@gmail.com>
quvi-scan: Setup SIGWINCH handler

Signed-off-by: Toni Gundogdu <legatvs@gmail.com>
quvi-get: Setup SIGWINCH handler

Signed-off-by: Toni Gundogdu <legatvs@gmail.com>
status: Reuse the status line, do not use newlines

Print all status messages to the same (status) line. Overwrite the
previous messages.

Other:
* Add a time prefix to the printed messages
* Tweak status messages

Signed-off-by: Toni Gundogdu <legatvs@gmail.com>
Merge branch 'tg/next__improve_status_updates' into next
quvi-dump: Postpone print after querying metainfo

With the (unbuffered) 'enum' of core.print-format, the program will:
  1) print the media properties
  2) query the metainfo properties for the media stream
  3) print the media stream properties

This causes a notable pause in the output when the program stops to
query the metadata (when applicable).

This commit changes quvi-dump so that the (unbuffered) output is printed
*after* the metainfo has been retrieved. This changes nothing for the
buffering filters (rfc2483, json, xml).

Signed-off-by: Toni Gundogdu <legatvs@gmail.com>
Change "skip:" messages

Signed-off-by: Toni Gundogdu <legatvs@gmail.com>
lget: http: Do not prepend a newline to error messages

Signed-off-by: Toni Gundogdu <legatvs@gmail.com>
lpbar_update: Do not prepend CR to the output

Instead, append it (CR, '\r') to the output -- unless the transfer is
complete, in which case, the output should end to a newline (LF, '\n').

Signed-off-by: Toni Gundogdu <legatvs@gmail.com>
FIX: DOC: Move "core.print-format" to a file dedicated for it

Signed-off-by: Toni Gundogdu <legatvs@gmail.com>
DOC: quvi-scan(1): Revise DEFAULT BEHAVIOUR section

Signed-off-by: Toni Gundogdu <legatvs@gmail.com>