Update configuration/options summary in svg

[jamuir]

Some of the comments summarizing the configuration/options could be confusing. E.g., "f" was used for "Filtering", but "-f" is the command-line option used to specify the sample frequency. Also, "hz" was used but there is no command-line option or config directive that mentions "hertz".

Change the summmary to use the names from the config file. Update the sample config file so it is more obvious what is parsed as a float, and also include "Cmdline", which was missing.

[jamuir]

Here is what the updated summary looks like:

<!-- This file is a bootchart SVG file. It is best rendered in a browser -->
<!-- such as Chrome, Chromium, or Firefox. Other applications that       -->
<!-- render these files properly but more slowly are ImageMagick, gimp,  -->
<!-- inkscape, etc. To display the files on your system, just point      -->
<!-- your browser to file:///run/log (the default location) and click.   -->

<!-- This file was generated by bootchart version 235, running with configuration:  -->

<!-- Samples=300 -->
<!-- Frequency=10.000000 -->
<!-- Relative=0 -->
<!-- Filter=1 -->
<!-- Output=/tmp -->
<!-- Init=/usr/lib/systemd/systemd -->
<!-- PlotMemoryUsage=0 -->
<!-- PlotEntropyGraph=0 -->
<!-- ScaleX=100.000000 -->
<!-- ScaleY=20.000000 -->
<!-- ControlGroup=0 -->
<!-- PerCPU=0 -->
<!-- Cmdline=1 -->

Note that the quotes around the values have been dropped.

[sofar]

No comments from my side. These are all reasonable changes.