[chord] patch comments

[Michael Walfish]

| >  void
| > +dhashclient::insert (bigint key, const char *buf,
| > +                     size_t buflen, cbinsertgw_t cb, 
| > +		     ptr<option_block> options)
| > +{
| > +  insert_worker_nopk (key, buf, buflen, cb, DHASH_CONTENTHASH, options);
| > +}
| > +
| > +void
| >  dhashclient::insert (const char *buf, size_t buflen, cbinsertgw_t cb,
| >                       ptr<option_block> options)
| >  {
| > @@ -128,6 +136,13 @@
| >    insert (key, buf, buflen, cb, options);
| >  }
| >  
| > +void
| > +dhashclient::insert_noauth (bigint key, const char *buf,
| > +                            size_t buflen, cbinsertgw_t cb,
| > +                            ptr<option_block> options)
| > +{
| > +    insert_worker_nopk (key, buf, buflen, cb, DHASH_NOAUTH, options);
| > +}
| 
| I don't see the difference between the first insert above and this
| new insert_noauth method.  I'll play with this a little. 

the ctype is different.

you could stick with one insert() method but then you'd have to expose the
dhash_ctype to callers (which you might want to do for consistency with
retrieves).