Set krb5 ccache only if krb5 is used
authorSimo Sorce <simo@redhat.com>
Sun, 21 Jun 2015 19:06:15 +0000 (15:06 -0400)
committerSimo Sorce <simo@redhat.com>
Sun, 21 Jun 2015 19:06:15 +0000 (15:06 -0400)
Check if the krb5 mechanism is present and only then set the cache, this
avoid wasteful operations if we are not even using krb5.

Signed-off-by: Simo Sorce <simo@redhat.com>

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