Bug 647364: support explicitly trusted leaf certificate.  Report a null trust anchor in this case.  Also fix comment typos, remove the unused matchingAnchor variable, and fix reference count bugs.  r=rrelyea.
Bug 647364: support explicitly trusted leaf certificate.  Report a null
trust anchor in this case.  Also fix comment typos, remove the unused
matchingAnchor variable, and fix reference count bugs.  r=rrelyea.

nmav/nss,ekr/nss-old,ekr/nss-old,nmav/nss,nmav/nss,nmav/nss,ekr/nss-old,nmav/nss,ekr/nss-old,ekr/nss-old,nmav/nss,nmav/nss,ekr/nss-old,ekr/nss-old