[BusyBox] networking/ directory doc fixes

[Robert P. J. Day]

arping:

	no mention of "-h" or "-?" options to get help.  again, should
	this just be a universal constant for BB commands?

ftpget,ftpput:

	might emphasize that some of those options take arguments in
	the list

httpd:

	Fix aesthetics of options list.
	Also no mention of what appear to be options "-v" and "-h" (if i'm
	reading the source correctly)

inetd:

	docs have no mention of "-f" option for uClinux

ipcalc:

	docs don't mention what appears to be a "-h" option for hostname

nslookup:

	nslookup [HOST] [SERVER]

	- the above suggests that HOST is optional.  it isn't.

ping6:

	docs don't mention:

	-v (for verbose)
	-I (for interface name?)

route:

	synopsis should mention that there are "[OPTION]"s, listed below

telnet:

	docs don't mention "-a" or "-l" options if autologin is set

telnetd:

	docs don't mention "-f" option for issuefile


rday