web: use html output for the debugging output from graph.php when debug > 2
web: use html output for the debugging output from graph.php when debug > 2

Bernard reported that text/plain was difficult to use, as the output was wider
than his monitor.  text/html allows the browser to do wrapping and reformat
the text so add the needed entities around the HTML encoded command.


dmourati/monitor-core,hinesmr/monitor-core,sdgdsffdsfff/monitor-core,fastly/monitor-core,fastly/monitor-core,fastly/monitor-core,mjzhou/monitor-core,dmourati/monitor-core,lawrencewu/monitor-core,ganglia/monitor-core,phreakocious/monitor-core,sdgdsffdsfff/monitor-core,dmourati/monitor-core,lawrencewu/monitor-core,sdgdsffdsfff/monitor-core,phreakocious/monitor-core,ganglia/monitor-core,phreakocious/monitor-core,ganglia/monitor-core,lawrencewu/monitor-core,ganglia/monitor-core,lawrencewu/monitor-core,NoodlesNZ/monitor-core,torkelsson/monitor-core,hinesmr/monitor-core,torkelsson/monitor-core,dmourati/monitor-core,fastly/monitor-core,sdgdsffdsfff/monitor-core,fastly/monitor-core,torkelsson/monitor-core,hinesmr/monitor-core,ganglia/monitor-core,lawrencewu/monitor-core,phreakocious/monitor-core,fastly/monitor-core,torkelsson/monitor-core,ganglia/monitor-core,mjzhou/monitor-core,NoodlesNZ/monitor-core,phreakocious/monitor-core,phreakocious/monitor-core,NoodlesNZ/monitor-core,phreakocious/monitor-core,lawrencewu/monitor-core,torkelsson/monitor-core,NoodlesNZ/monitor-core,NoodlesNZ/monitor-core,ganglia/monitor-core,ganglia/monitor-core,sdgdsffdsfff/monitor-core,lawrencewu/monitor-core,mjzhou/monitor-core,dmourati/monitor-core,torkelsson/monitor-core,hinesmr/monitor-core,torkelsson/monitor-core,mjzhou/monitor-core,dmourati/monitor-core,sdgdsffdsfff/monitor-core,mjzhou/monitor-core,mjzhou/monitor-core,NoodlesNZ/monitor-core,fastly/monitor-core,NoodlesNZ/monitor-core,mjzhou/monitor-core,hinesmr/monitor-core,sdgdsffdsfff/monitor-core