Better error handling on -deny & -allow flags

[nil0x42]

It's not clear on the doc what is the correct syntax for -allow & -deny flags.

For example, if i try:
echo http://localhost | httpx -json -probe -deny 127.0.0.0/8,10.0.0.0/8 | gron

httpx runs the query without error, even thought this comma-separated syntax is invalid

For it to work each CIDR must be added with a new -deny:
echo http://localhost | httpx -json -probe -deny 127.0.0.0/8 -deny 10.0.0.0/8 | gron

But unless the user takes time to launche a local webserv, and try syntax until it works, it's confusing because httpx doesn't fail when syntax is invalid.

I would expect an error like Invalid IP or CIDR: '127.0.0.0/8,10.0.0.0/8', so user is easily able to infer which is the correct syntax.

[ehsandeep]

@nil0x42 we have updated this feature support to allow comma separate multiple values or new line delimited file input as well.

For example:-

echo http://localhost | httpx -probe -deny 127.0.0.0/8,10.0.0.0/8,1.1.1.1
echo http://localhost | httpx -probe -allow 127.0.0.0/8,10.0.0.0/8,1.1.1.1
echo http://localhost | httpx -probe -allow allow-list.txt
echo http://localhost | httpx -probe -deny deny-list.txt