pull up r25384 from trunk

 ------------------------------------------------------------------------
 r25384 | ghudson | 2011-10-19 23:45:12 -0400 (Wed, 19 Oct 2011) | 12 lines

 ticket: 6987
 subject: Fix krb5_cc_set_config
 target_version: 1.10
 tags: pullup

 krb5_cc_set_config has been non-functional since r24753 on cache types
 which don't support removal of credential entries.  Fix it by only
 calling krb5_cc_remove_cred if data is NULL, since krb5_cc_store_cred
 will do it anyway in the positive case.

 Also fix an old memory leak in an uncommon error case.

https://github.com/krb5/krb5/commit/eaeb314ab93fca60f7615265204ec71c68696a7b
Commit By: tlyu
Revision: 25388
Changed Files:
U   branches/krb5-1-10/src/lib/krb5/ccache/ccfns.c