Add support for reading hosts/subnets from a file

[urhot]

This pull requests adds new argument to allow reading the hosts/subnets from a file.

This is sort of a duplicate of another pull request #42, but with a different approach. I leave it up to the author to decide if he wants to go forward with either of these.

Usage

New parameter: --routes-file <filename> or -f <filename>

For example:

vpn-slice --routes-file=/home/bob/.vpn-routes

The routes file should have one host per line, with optional comments:

# This is a comment
192.0.2.1
# Another comment
test1.example.com # one more comment
test2.example.com

To be considered

• Are the argument names good? Is it acceptable to dedicate -f for this feature?

Differences to the implementation in #42

• The provided file is not called a "config file", but just a list of hosts
• Does not use fromfile_prefix_chars, but instead a simple custom parser that knows how to handle comments

[nstp11]

Hi all, is there any update on this case?
Will we add this enhancement?

Regards