Support quoting vertical bar (|) character in plugin output

[Jochen Bern]

On 27.03.2013 12:24, Andreas Ericsson wrote:
> OTOH, perfdata should've been on a line of its own from the start,
> prefixed with 'perfdata=' instead of a magic character put in the
> plugin output.

Just in case that someone reads (or later unearths) this thread looking
for actual suggestions: Making it a magic *character* IMHO isn't the
problem *IF*:
-- it helps with still-limited buffers
-- you require it to appear *first* on the line (no scanning ahead
   Lord-knows-how-far or breaking lines up)
-- you define a method (character stuffing?) to escape it in
   non-perfdata ("output") lines
-- you allow an *arbitrary mix* of output and perfdata lines (so that
   you can run a *series* of plugins or have a plugin printf() data
   in whichever sequence it "naturally" comes across it without having
   to worry that that'll break the global syntax)
-- you do the concatenation within Nagios properly (add back the '\n'
   at the end of output lines *and a ' ' between perfdata lines*; the
   current core assembles the perfdata from
	printf("foo|bar=1\nbaz|org=2\n");
   into "bar=1org=2")
             ^^

Regards,
								J. Bern
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