[Security] Even more strict on address bar for IPNS

[bbondy]

This issue #13872 makes it so we only use ipns:// and ipfs:// for configured gateways.

This issue #13873 is for being more strict for ipfs://.

For IPNS, once we have DNSLink, we should only replace when there's a valid CID and when DNSLink has no information for the name being used.

[stephendonner]

@spylogsster mind adding a test plan for this and #13873? Thanks!

[spylogsster]

@stephendonner same as here #13873 (comment)

[stephendonner]

@lidel do you have any (additional) testcases to help me verify this (in addition to #13873)? Thanks!

[lidel]

@stephendonner you mean for DNSLink names other than brantly.eth from #13873 (comment)?

• This should succeed and redirect to ipns:// (has DNSLink)
  http://en.wikipedia-on-ipfs.org.ipns.localhost:[gw port]/#/
• This should fail and not redirect to ipns:// (no DNSLink)
  http://google.com.ipns.localhost:[gw port]/#/

[stephendonner]

Verified PASSED with

Brave	1.24.50 Chromium: 90.0.4430.51 (Official Build) nightly (x86_64)
Revision	32e5fa33a31641bded70a90e60121060691e7125-refs/branch-heads/4430@{#927}
OS	macOS Version 11.2.3 (Build 20D91)

Steps:

1. loaded http://en.wikipedia-on-ipfs.org.ipns.localhost:48081/ and redirected to http://en.wikipedia-on-ipfs.org.ipns.localhost:48081/wiki; clicked on Open using IPFS and got ipns://en.wikipedia-on-ipfs.org/wiki
2. loaded http://google.com.ipns.localhost:48081 and got expected ipfs resolve -r /ipns/google.com/: could not resolve name error

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Verification passed on

Brave	1.24.70 Chromium: 90.0.4430.72 (Official Build) beta (64-bit)
Revision	b6172ef8d07ef486489a4b11b66b2eaeed50d132-refs/branch-heads/4430@{#1233}
OS	Ubuntu 20

Verified the above test plan

---

Verified PASSED with

Brave	1.24.82 Chromium: 90.0.4430.93 (Official Build) (64-bit)
Revision	4df112c29cfe9a2c69b14195c0275faed4e997a7-refs/branch-heads/4430@{#1348}
OS	Windows 10 OS Version 2009 (Build 21370.1)

Steps:

1. loaded http://en.wikipedia-on-ipfs.org.ipns.localhost:48084/ and redirected to http://en.wikipedia-on-ipfs.org.ipns.localhost:48084/wiki; clicked on Open using IPFS and got ipns://en.wikipedia-on-ipfs.org/wiki
2. loaded http://google.com.ipns.localhost:48084 and got expected ipfs resolve -r /ipns/google.com/: could not resolve name error

example	example	example