[PATCH v2] perf tools: bug fix, an error of parsing 'man.<tool>.*' config variable.

[Taeung Song]

To add new man viewer, configs like 'man.<tool>.cmd',
'man.<tool>.path' can be set into config file (~/.perfconfig).
But parsing config file is stopped because the config variable
contains '.' character i.e.

If setting 'man.xman.cmd' into config file,

[man]
        gman.cmd = gman

when launching perf an error message is printed like below.

Fatal: bad config file line 11 in /home/taeung/.perfconfig

So modify iskeychar() function to decide '.' character
as key character parsing config file.

Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Signed-off-by: Taeung Song <treeze.taeung@xxxxxxxxx>
---
 tools/perf/util/config.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/util/config.c b/tools/perf/util/config.c
index d3e12e3..3c01ced 100644
--- a/tools/perf/util/config.c
+++ b/tools/perf/util/config.c
@@ -122,7 +122,7 @@ static char *parse_value(void)
 
 static inline int iskeychar(int c)
 {
-	return isalnum(c) || c == '-' || c == '_';
+	return isalnum(c) || c == '-' || c == '_' || c == '.';
 }
 
 static int get_value(config_fn_t fn, void *data, char *name, unsigned int len)
-- 
2.5.0