Explain 'man.viewer' variable and how to add
new man viewer tools.

Cc: Namhyung Kim <[email protected]>
Cc: Jiri Olsa <[email protected]>
Signed-off-by: Taeung Song <[email protected]>
---
 tools/perf/Documentation/perf-config.txt | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/tools/perf/Documentation/perf-config.txt 
b/tools/perf/Documentation/perf-config.txt
index c03ee94..815e51f 100644
--- a/tools/perf/Documentation/perf-config.txt
+++ b/tools/perf/Documentation/perf-config.txt
@@ -413,6 +413,15 @@ top.*::
                as well as 'Self' overhead column by default.
                The default is true.
 
+man.*::
+       man.viewer::
+               This option can assign a tool to view manual pages when 'help'
+               subcommand was invoked. Supported tools are 'man', 'woman'
+               (with emacs client) and 'konqueror'. Default is 'man'.
+
+               New man viewer tool can be also added using 'man.<tool>.cmd'
+               or use different path using 'man.<tool>.path' config option.
+
 SEE ALSO
 --------
 linkperf:perf[1]
-- 
1.9.1

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