Generate the varnishstat(1) key bindings section

It should currently result in 1:1 RST code, and might be output slightly
differently to accomodate a help screen, without changing the semantic
of the RST code.

bin/varnishstat/varnishstat.c

@@ -257,6 +257,18 @@ usage(int status)
 	exit(status);
 }
 
+static int
+key_bindings(void)
+{
+
+#define BINDING_KEY(chr, name, next)	\
+	printf("<%s>" next, name);
+#define BINDING(name, desc)		\
+	printf("\n%s\n\n", desc);
+#include "varnishstat_bindings.h"
+	return (0);
+}
+
 int
 main(int argc, char * const *argv)
 {
@@ -267,6 +279,9 @@ main(int argc, char * const *argv)
 	int has_f = 0;
 	struct vsc *vsc;
 
+	if (argc == 2 && !strcmp(argv[1], "--bindings"))
+		exit(key_bindings());
+
 	vut = VUT_InitProg(argc, argv, &vopt_spec);
 	AN(vut);
 	vd = VSM_New();

doc/sphinx/Makefile.am

@@ -187,8 +187,12 @@ include/varnishstat_options.rst: $(top_builddir)/bin/varnishstat/varnishstat
 include/varnishstat_synopsis.rst: $(top_builddir)/bin/varnishstat/varnishstat
 	$(top_builddir)/bin/varnishstat/varnishstat --synopsis > ${@}_
 	mv ${@}_ ${@}
+include/varnishstat_bindings.rst: $(top_builddir)/bin/varnishstat/varnishstat
+	$(top_builddir)/bin/varnishstat/varnishstat --bindings > ${@}_
+	mv ${@}_ ${@}
 BUILT_SOURCES += include/varnishstat_options.rst \
-	 include/varnishstat_synopsis.rst
+	 include/varnishstat_synopsis.rst \
+	 include/varnishstat_bindings.rst
 
 include/vsl-tags.rst: $(top_builddir)/lib/libvarnishapi/vsl2rst
 	$(top_builddir)/lib/libvarnishapi/vsl2rst > ${@}_

doc/sphinx/reference/varnishstat.rst

@@ -71,54 +71,7 @@ Avg_1000
 Key bindings
 ------------
 
-The following keys control the interactive display:
-
-<UP> or <k>
-	Navigate the counter list one line up.
-
-<DOWN> or <j>
-	Navigate the counter list one line down.
-
-<PAGEUP> or <b> or <CTRL-b>
-	Navigate the counter list one page up.
-
-<PAGEDOWN> or <SPACE> or <CTRL-f>
-	Navigate the counter list one page down.
-
-<HOME> or <g>
-	Navigate the counter list to the top.
-
-<END> or <G>
-	Navigate the counter list to the bottom.
-
-<d>
-	Toggle between showing and hiding unseen counters. Unseen
-	counters are those that has been zero for the entire runtime
-	of varnishstat. Defaults to hide unseen counters.
-
-<e>
-	Toggle scaling of values.
-
-<v>
-	Increase verbosity. Defaults to only showing informational
-	counters.
-
-<V>
-	Decrease verbosity. Defaults to only showing informational
-	counters.
-
-<q>
-	Quit.
-
-<CTRL+T>
-	Sample now.
-
-<+>
-	Increase refresh interval.
-
-<->
-	Decrease refresh interval.
-
+.. include:: ../include/varnishstat_bindings.rst
 
 OUTPUTS
 =======