Update configuration/options summary in svg

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.

src/bootchart.conf

@@ -13,14 +13,15 @@
 
 [Bootchart]
 #Samples=500
-#Frequency=25
+#Frequency=25.0
 #Relative=no
 #Filter=yes
-#Output=<folder name, defaults to /run/log>
-#Init=/path/to/init-binary
+#Output=<directory name, defaults to /run/log>
+#Init=<path to init, defaults to the systemd binary>
 #PlotMemoryUsage=no
 #PlotEntropyGraph=no
-#ScaleX=100
-#ScaleY=20
+#ScaleX=100.0
+#ScaleY=20.0
 #ControlGroup=no
 #PerCPU=no
+#Cmdline=no

src/svg.c

@@ -105,14 +105,23 @@ static void svg_header(FILE *of, struct list_sample_data *head, double graph_sta
         fprintf(of, "<!-- such as Chrome, Chromium, or Firefox. Other applications that       -->\n");
         fprintf(of, "<!-- render these files properly but more slowly are ImageMagick, gimp,  -->\n");
         fprintf(of, "<!-- inkscape, etc. To display the files on your system, just point      -->\n");
-        fprintf(of, "<!-- your browser to file:///run/log/ and click. This bootchart was      -->\n\n");
-
-        fprintf(of, "<!-- generated by bootchart version %s, running with options:  -->\n", VERSION);
-        fprintf(of, "<!-- hz=\"%f\" n=\"%d\" -->\n", arg_hz, arg_samples_len);
-        fprintf(of, "<!-- x=\"%f\" y=\"%f\" -->\n", arg_scale_x, arg_scale_y);
-        fprintf(of, "<!-- rel=\"%d\" f=\"%d\" -->\n", arg_relative, arg_filter);
-        fprintf(of, "<!-- p=\"%d\" e=\"%d\" -->\n", arg_pss, arg_entropy);
-        fprintf(of, "<!-- o=\"%s\" i=\"%s\" -->\n\n", arg_output_path, arg_init_path);
+        fprintf(of, "<!-- your browser to file:///run/log (the default location) and click.   -->\n\n");
+
+        fprintf(of, "<!-- This file was generated by bootchart version %s, running with configuration:  -->\n\n", VERSION);
+
+        fprintf(of, "<!-- Samples=%d -->\n", arg_samples_len);
+        fprintf(of, "<!-- Frequency=%f -->\n", arg_hz);
+        fprintf(of, "<!-- Relative=%d -->\n", arg_relative);
+        fprintf(of, "<!-- Filter=%d -->\n", arg_filter);
+        fprintf(of, "<!-- Output=%s -->\n", arg_output_path);
+        fprintf(of, "<!-- Init=%s -->\n", arg_init_path);
+        fprintf(of, "<!-- PlotMemoryUsage=%d -->\n", arg_pss);
+        fprintf(of, "<!-- PlotEntropyGraph=%d -->\n", arg_entropy);
+        fprintf(of, "<!-- ScaleX=%f -->\n", arg_scale_x);
+        fprintf(of, "<!-- ScaleY=%f -->\n", arg_scale_y);
+        fprintf(of, "<!-- ControlGroup=%d -->\n", arg_show_cgroup);
+        fprintf(of, "<!-- PerCPU=%d -->\n", arg_percpu);
+        fprintf(of, "<!-- Cmdline=%d -->\n\n", arg_show_cmdline);
 
         /* style sheet */
         fprintf(of, "<defs>\n  <style type=\"text/css\">\n    <![CDATA[\n");