krb5 commit: Clarify kinit principal selection

[Tom Yu]

https://github.com/krb5/krb5/commit/9896d4ffecb69f0262375b2f0db5b275a5e25de9
commit 9896d4ffecb69f0262375b2f0db5b275a5e25de9
Author: Tom Yu <tlyu at mit.edu>
Date:   Wed Sep 28 12:33:52 2016 -0400

    Clarify kinit principal selection
    
    Describe the principal selection behavior of kinit when the principal
    argument is absent.
    
    ticket: 8403
    target_version: 1.14-next
    tags: pullup

 doc/user/user_commands/kinit.rst |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/doc/user/user_commands/kinit.rst b/doc/user/user_commands/kinit.rst
index 72721c3..3f9d534 100644
--- a/doc/user/user_commands/kinit.rst
+++ b/doc/user/user_commands/kinit.rst
@@ -33,7 +33,10 @@ DESCRIPTION
 -----------
 
 kinit obtains and caches an initial ticket-granting ticket for
-*principal*.
+*principal*.  If *principal* is absent, kinit chooses an appropriate
+principal name based on existing credential cache contents or the
+local username of the user invoking kinit.  Some options modify the
+choice of principal name.
 
 
 OPTIONS