Audit rmdir(1)

1) style fix (don't arrange local variables)
2) BUGFIX: Previously, if ret was turned 1 for some folder, it
   would disable the p-flag for every following folders, which
   is not desired.
   Instead, the "else if" makes sure that the p-flag-section is
   only entered when the initial rmdir succeeds.
3) BUGFIX: Previously, the program would cancel with eprintf if
   it failed to remove one folder in the parent-pathname.
   This is not desired, as we have other folders pending.
   Instead, print a warning for the current failing parent-folder,
   set ret to 1 and break off the loop at this point.
   This allows to finish the other pending folders without issues.

README

@@ -57,7 +57,7 @@ The following tools are implemented ('*' == finished, '#' == UTF-8 support,
 =   readlink        non-posix                    none
 =*  renice          yes                          none
 =*| rm              yes                          none (-i)
-=*  rmdir           yes                          none
+=*| rmdir           yes                          none
 #   sed
     seq             non-posix                    none
 =*| setsid          non-posix                    none