Fix deleted node handling in libprofile

In profile_find_node, skip deleted nodes when finding the second
match.  Otherwise, profile_clear_nodes could return an error if a node
has some values to clear but the last one is deleted.

In profile_node_iterator, skip deleted nodes when looking up the
section names.  Otherwise we could iterate over a deleted section
and/or ignore its replacement.

(cherry picked from commit e7f50a1c11845ba73ce4ffa4729d10113563a247)

https://github.com/krb5/krb5/commit/d94ec3f610f1ff3198e306523bc5dbd227c4f219
Author: Greg Hudson <ghudson@mit.edu>
Committer: Tom Yu <tlyu@mit.edu>
Commit: d94ec3f610f1ff3198e306523bc5dbd227c4f219
Branch: krb5-1.11
 src/util/profile/prof_tree.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)