Bugzilla bug 136279: Return oldpath only if it is different from path. Avoid an unnecessary call to SECMOD_HasRootCerts in nss_FindExternalRoot.
Bugzilla bug 136279: Return oldpath only if it is different from path.
Avoid an unnecessary call to SECMOD_HasRootCerts in nss_FindExternalRoot.

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