We no longer implement a wrapper over strdup - g_strdup
is preferred.

The use of strncpy was removed in:
commit 7d70a63b
    util: Improve virStrncpy() implementation
Signed-off-by: NJán Tomko <jtomko@redhat.com>
Reviewed-by: NMichal Privoznik <mprivozn@redhat.com>