sfeed: parsetime: allow leap second like 23:59:60

Specified in RFC2822 Section 3.3. Date and Time Specification

"[...] the time-of-day MUST be in the range 00:00:00 through 23:59:60 (the
number of seconds allowing for a leap second; see [STD12]) [...]"

To test:

	<entry><updated>2016-12-31T23:59:60Z</updated></entry>

1 files changed, 1 insertions, 1 deletions

diff --git a/sfeed.c b/sfeed.c
index 2509562..e34e90a 100644
--- a/sfeed.c
+++ b/sfeed.c
@@ -647,7 +647,7 @@ parsetime(const char *s, time_t *tp)
 	    va[2] < 1 || va[2] > 31 ||
 	    va[3] < 0 || va[3] > 23 ||
 	    va[4] < 0 || va[4] > 59 ||
-	    va[5] < 0 || va[5] > 59)
+	    va[5] < 0 || va[5] > 60) /* allow leap second */
 		return -1;
 
 	if (tp)