Update documenation to reflect correct default region of ''

[kula]

Ever since commit 5db1e9f the default region as been '', instead of 'us-east-1'. Update documentation to reflect this, in particular, documentation about notifications.

Description

Two documents were updated to reflect the current default for the region setting.

Motivation and Context

If you try to follow the documentation to set up notifications, you'll be prompted to install event arns with a region set to us-east-1, which will cause event notifications to silently not work, as minio believes it is in the `` region.

How Has This Been Tested?

No testing, documentation changes only.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

[codecov]

Codecov Report

Merging #5101 into master will increase coverage by <.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #5101      +/-   ##
==========================================
+ Coverage   61.24%   61.24%   +<.01%     
==========================================
  Files         193      193              
  Lines       28411    28411              
==========================================
+ Hits        17399    17400       +1     
- Misses       9747     9748       +1     
+ Partials     1265     1263       -2

Impacted Files	Coverage Δ
cmd/fs-v1-background-append.go	73.82% <0%> (-2.69%)	⬇️
cmd/fs-v1-rwpool.go	68.69% <0%> (+4.34%)	⬆️

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[harshavardhana]

Thanks for the PR but this might be a bug.. when region is not set all regions should be honored..

[deekoder]

I found that this issue also happened in sqs arn. I had to remove us-east-1. So i approve.

[krisis]

Thanks for the PR @kula. This document change reflects the current behaviour. We can take this in and address server behaviour later, if required.

[deekoder]

I will open a separate issue for the server also being ok with us-east-1 in the arn.

[harshavardhana]

us-east-1 ARN seems to be not the problem here

mc events add myminio/testbucket arn:minio:sqs:us-east-1:test1:redis
Successfully added arn:minio:sqs:us-east-1:test1:redis

This is successful even with server region being empty, i see that we already have code to handle this correctly. But there is a problem when sending events though.

While it is saved as is the notification is picked from a map which doesn't store it in the same manner, this is a bug. Doc fix is correct but the correct fix is .. #5119