[ENHANCEMENT] htpasswd utility with DBM support

[Mladen Turk]

Hi all,

Here is an enhancement that enables username management using either SDBM or
any other apr supported DBM. I've tested it only using SDBM on WIN32, but it
should compile on other platforms.

I know that there is a dbmmanage.pl perl script that is used to manage DBM
files, but since apr supports dbm, here is the solution.

Didn't make a diff, but rather attached the entire htpasswd.c

MT.

htpasswd.c