Publish selected certificates stored in SecPublicInfo
We may want to provide a method
SecPublicInfo::publishCertifcate(Face& face, const Name& prefix), so that application can publish its own certificates.
prefix, application can restrict the certificates that will be published.
We may also provide another method
SecPublicInfo::publishCertificate(Face& face, const Name& prefix, const PreSearchHook& preHook, const PostSearchHook& postHook), so that application may customize what to search and how to process the search result. This would be useful in applications (such as NLSR) which need to wrap a certificate with another.