[BusyBox] issue, passwd, and ipcalc patches

[Joshua Jackson]

Attaches is a patch that fixes the following issues:

- Improper handling of CRLF in issue fiies
(This patch was submitted a while back but never made it into CVS for some 
reason or another. It simply ports the issue file handling from the stable 
version of tinylogin into the current busybox tree)

- Fixes the md5 default for the passwd command.  Most of my previous patch for 
this was committed, but one flag default was left out causing the default 
behaviour of the "-a" parameter to swith to md5, but not the applet default. 
Is there a reason to have passwd generate DES passwords by default?

- Adds prefix handing to ipcalc
- Addresses can be specified as 192.168.0.1/24
- a "-p" parameter was added to output PREFIX=
- netmasks of 0 are now supported for validating addresses such as a default 
route that has a /0 prefix or 0.0.0.0 netmask

--
Joshua Jackson
Vortech Consulting, LLC
http://www.vortech.net
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