pg_resetxlog options

pg_resetxlog uses a non-standard options parsing method: The -l option
requires two arguments (-l fileid seg).  I propose to change this to -l
fileid,seg which is the standard way to separate suboptions.

Secondly, the -n option appears to be redundant with pg_controldata.  Do
we need it?

Thirdly, pg_resetxlog uses the term "guessed" controldata values if it
can't read the real ones.  I found this to be confusing, because the code
doesn't do a whole lot of guessing.  Would it be better to say that the
values are simply defaulted (and to what)?

-- 
Peter Eisentraut   peter_e@gmx.net