_redirects file's "to" field may be a full URL with different scheme

[John-LittleBearLabs]

Up to this point I had only been supporting redirects to IPFS paths (including those under /ipns/ namespace).

ipfs.tech , for example, has https:// URLs in its _redirects file.

This change is to make that work.

[codecov[bot]]

Codecov Report

Attention: 317 lines in your changes are missing coverage. Please review.

Comparison is base (479894a) 52.45% compared to head (d31317d) 61.03%. Report is 13 commits behind head on main.

:exclamation: Current head d31317d differs from pull request most recent head cc404ce. Consider uploading reports for the commit cc404ce to get more accurate results

Files	Patch %	Lines
library/src/ipfs_client/gw/gateway_request.cc	59.78%	76 Missing :warning:
library/src/ipfs_client/all_inclusive.cc	0.00%	67 Missing :warning:
...brary/src/ipfs_client/gw/gateway_http_requestor.cc	57.25%	56 Missing :warning:
library/src/ipfs_client/gw/requestor.cc	41.89%	43 Missing :warning:
library/src/ipfs_client/gw/requestor_pool.cc	52.08%	23 Missing :warning:
library/src/ipfs_client/dag_cbor_value.cc	62.26%	20 Missing :warning:
library/include/vocab/html_escape.h	42.85%	8 Missing :warning:
library/src/ipfs_client/gateways.cc	76.47%	4 Missing :warning:
library/src/ipfs_client/gw/default_requestor.cc	81.25%	3 Missing :warning:
library/src/ipfs_client/gw/dnslink_requestor.cc	91.17%	3 Missing :warning:
... and 9 more

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #84 +/- ## ========================================== + Coverage 52.45% 61.03% +8.57% ========================================== Files 48 72 +24 Lines 2381 3131 +750 ========================================== + Hits 1249 1911 +662 - Misses 1132 1220 +88 ```

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