added explan of algorithm

diff --git a/man/mrcheck.1 b/man/mrcheck.1
index ef8a9a4d1ac4ea2cfd6dd70ff200013eeaa53435..2dd1f05aacb9b6d000885c4d1a54c83ded2d8155 100644 (file)
--- a/man/mrcheck.1
+++ b/man/mrcheck.1
@@ -43,6 +43,8 @@ val1, val2
 These values are service dependant, and are ignored by
 the update algorithm.
 .PP
+The determination that a service needs updating is that the last update
+failed, or that the current update is more than an hour past due.
 .SH DIAGNOSTICS
 Pay attention to Kerberos diagnostics, as one must be authenticated to
 do most SMS database work.