Fix typo in rlm_dbm_parser man page

[Alan DeKok]

John Dennis wrote:
> rlm_dbm_parser is installed in /usr/bin but it's man page (and it's
> contents) call it rlm_dbm_parse (note the missing trailing r).
> 
> The name of the man page and the executable it documents need to match.
> 
> Attached is a git patch (can be applied with git am) to fix the naming.
> It should be applied to all the branches.

  Applied, thanks.

  Alan DeKok.