Fix SPF parsing and IP evaluation

[MattIPv4]

Type of Change

• Tool Source: SPF parsing

What issue does this relate to?

Fixes #201

What should this PR do?

Fixes the parsing issue with quotes in SPF records not being handled correctly.

Fixes the IP evaluation logic to properly understand CIDR blocks.

What are the acceptance criteria?

When loading the SPF records for facebook.com, the returned data for _spf.facebook.com does not include quotation marks.

When loading the SPF records for facebook.com, 66.220.144.129 evaluates successfully, and 123.456.123.456 does not.

[mikeyp]

Looks like facebook.com is passing, but I tried a few others including digitalocean.com and got a runtime error:

Uncaught runtime errors:
×
ERROR
Invalid argument: <addr>/<prefix> expected
    at new m (http://localhost:8001/mount.js:2:376993)
    at Object.createCIDR (http://localhost:8001/mount.js:2:383228)
    at o.addNetworkClass (http://localhost:8001/mount.js:2:280829)
    at new o (http://localhost:8001/mount.js:2:280758)
    at new s (http://localhost:8001/mount.js:2:561705)
    at Object.import (http://localhost:8001/mount.js:2:561957)
    at Proxy.init (http://localhost:8001/mount.js:2:479474)
    at Proxy.mounted (http://localhost:8001/mount.js:2:477464)
    at http://localhost:8001/mount.js:2:128880
    at f (http://localhost:8001/mount.js:2:103443)
ERROR
Invalid argument: <addr>/<prefix> expected
    at new m (http://localhost:8001/mount.js:2:376993)
    at Object.createCIDR (http://localhost:8001/mount.js:2:383228)
    at o.addNetworkClass (http://localhost:8001/mount.js:2:280829)
    at new o (http://localhost:8001/mount.js:2:280758)
    at new s (http://localhost:8001/mount.js:2:561705)
    at Object.import (http://localhost:8001/mount.js:2:561957)
    at Proxy.init (http://localhost:8001/mount.js:2:479474)
    at Proxy.mounted (http://localhost:8001/mount.js:2:477464)
    at http://localhost:8001/mount.js:2:128880
    at f (http://localhost:8001/mount.js:2:103443)

[MattIPv4]

Good spot, I forgot that ip4 and ip6 also allow for bare IPs, rather than ranges.

[mikeyp]

LGTM