Add a basic support for parsing hosts from virtual private cloud

[Drvi]

A very simple fix,we would ideally use something more robust to parse the input. Maybe we could see what the Java SDK does.

[codecov]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (db6d637) 67.21% compared to head (4c002be) 67.81%.

Files	Patch %	Lines
src/aws.jl	50.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #35      +/-   ##
==========================================
+ Coverage   67.21%   67.81%   +0.59%     
==========================================
  Files           5        5              
  Lines         610      612       +2     
==========================================
+ Hits          410      415       +5     
+ Misses        200      197       -3     

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[nickrobinson251]

i took a look at the Java and Rust AWS SDKs and couldn't figure out where they were doing this kind of parsing, but a look at the test cases suggests that there are also "s3 control" URLs that are 8-parts long, like:

https://123456789012.control.vpce-1a2b3c4d-5e6f.s3.us-west-2.vpce.amazonaws.com

https://github.com/aws/aws-sdk-java-v2/blob/b85450fc77a6939abf734dcf01ddb90a8f277669/services/s3control/src/main/resources/codegen-resources/endpoint-tests.json#L1301
or

http://bucket-name.control.vpce-1a2b3c4d-5e6f.s3.us-west-2.vpce.amazonaws.com

https://github.com/awslabs/aws-sdk-rust/blob/3a73776042e02c0224546276246614884b2c50ab/sdk/s3/src/config/endpoint.rs#L5125

Do we need to handle those here too?

[quinnj]

LGTM; do you know if there's anything similar for azure or GCP? (we don't need to do it here, but might be worth a quick search around)