[BusyBox] ipcalc and httpd corrections

[Vladimir N. Oleynik]

Hi.

Last patch have small corrections for ipcalc and httpd applets.

Busybox CVS version ipcalc have problems:
- Can`t use 255.255.255.255 address
- typo: double check for valid ip address and uncheck for valid mask

httpd unseted SERVER_PORT (my bug from last_patch111).

Patch attached.



--w
vodz
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