When FreeBSD gets a stdint.h, change the conditionally-compiled
inttypes.h inclusion in hashtbl.c to stdint.h.

is it desirable to let the user say, don't descend this directory
(e.g., /var/apache), but do descend one of its children (e.g.,
/var/apache/bin)?  I think it's probably better to encourage users to
run integrit with multiple conf files in that situation.

document the fact that a hash at the beginning of a line in the conf
file marks a comment.  hashes after valid lines (i.e., comments like
this "foo=bar # bar is my favorite!") are not supported.  

find out about possible bug in FreeBSD's readdir_r and change
conditionally compiled readdir back to readdir_r.

add configure option to compile in the DTD for the XML output.

