check_uptime: Add option to report uptime in days instead of seconds

Currently, the plugin output is:

  CRITICAL: Uptime is 38829029 seconds.

When using the proposed `--days|-d` option, it will be:

  CRITICAL: Uptime is 449 days.

1 files changed, 7 insertions, 1 deletions

diff --git a/plugins-scripts/t/check_uptime.t b/plugins-scripts/t/check_uptime.t
index c395307c..b31d0c6c 100644
--- a/plugins-scripts/t/check_uptime.t
+++ b/plugins-scripts/t/check_uptime.t
@@ -5,7 +5,7 @@
 #
 
 use strict;
-use Test::More tests => 40;
+use Test::More tests => 42;
 use NPTest;
 
 my $result;
@@ -46,6 +46,12 @@ cmp_ok( $result->return_code, '==', 2, "Uptime higher than 2 seconds" );
 like  ( $result->output, '/Running since \d+/', "Output for the s parameter correct" );
 
 $result = NPTest->testCmd(
+        "./check_uptime -d -w 1 -c 2"
+        );
+cmp_ok( $result->return_code, '==', 2, "Uptime higher than 2 seconds" );
+like  ( $result->output, '/CRITICAL: uptime is \d+ days/', "Output for the d parameter correct" );
+
+$result = NPTest->testCmd(
         "./check_uptime -w 1 -c 2"
         );
 cmp_ok( $result->return_code, '==', 2, "Uptime higher than 2 seconds" );