[master] minor editorial correction. going to push directly.

src/cppcheck-suppress.lst

@@ -4,7 +4,7 @@ debug
 missingInclude
 // This is a template, and should be excluded from the check
 unreadVariable:src/lib/dns/rdata/template.cc:59
-// These two trigger warnings due to the incomplete implementation.  This is
+// These three trigger warnings due to the incomplete implementation.  This is
 // our problem, but we need to suppress the warnings for now.
 functionConst:src/lib/cache/resolver_cache.h
 functionConst:src/lib/cache/message_cache.h