Redact sensitive values from config in health data

[anjalshireesh]

Description

The health api returns the server configuration details. Redact
sensitive values from the config values like URLs and credentials.

Motivation and Context

Prevent sensitive info from leaking out through healthinfo api

How to test this PR?

• Configure a bucket notification e.g. notify_webhook
• Generate health report using mc admin subnet health {alias}
• Verify that sensitve information like URLs/keys/certs are shown as *redacted* in the generated report

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Optimization (provides speedup with no functional changes)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• Fixes a regression (If yes, please add commit-id or PR # here)
• Documentation updated
• Unit tests added/updated

[minio-trusted]

Mint Automation

Test	Result
mint-large-bucket.sh	✔️
mint-fs.sh	✔️
mint-gateway-s3.sh	✔️
mint-erasure.sh	✔️
mint-dist-erasure.sh	✔️
mint-zoned.sh	✔️
mint-gateway-nas.sh	✔️
mint-compress-encrypt-dist-erasure.sh	❌ more...

12421-3f21dd5/mint-compress-encrypt-dist-erasure.sh.log:

Running with
SERVER_ENDPOINT:      minio-c3.minio.io:30279
ACCESS_KEY:           minio
SECRET_KEY:           ***REDACTED***
ENABLE_HTTPS:         0
SERVER_REGION:        us-east-1
MINT_DATA_DIR:        /mint/data
MINT_MODE:            full
ENABLE_VIRTUAL_STYLE: 0

To get logs, run 'docker cp 2aacf6781a3a:/mint/log /tmp/mint-logs'

(1/15) Running aws-sdk-go tests ... done in 1 seconds
(2/15) Running aws-sdk-java tests ... done in 2 seconds
(3/15) Running aws-sdk-php tests ... done in 43 seconds
(4/15) Running aws-sdk-ruby tests ... done in 3 seconds
(5/15) Running awscli tests ... done in 2 minutes and 12 seconds
(6/15) Running healthcheck tests ... done in 0 seconds
(7/15) Running mc tests ... done in 1 minutes and 0 seconds
(8/15) Running minio-dotnet tests ... done in 45 seconds
(9/15) Running minio-go tests ... done in 2 minutes and 0 seconds
(10/15) Running minio-java tests ... FAILED in 1 minutes and 25 seconds
{
  "name": "minio-java",
  "function": "composeObject()",
  "args": "[single source with offset]",
  "duration": 30,
  "status": "FAIL",
  "error": "error occurred\nErrorResponse(code = InvalidArgument, message = Range specified is not valid for source object, bucketName = minio-java-test-3eo2m72, objectName = minio-java-test-2ab04eu, resource = /minio-java-test-3eo2m72/minio-java-test-2ab04eu, requestId = 1684C8756127B347, hostId = 9f2ee140-1151-488b-b42d-d623a3259837)\nrequest={method=PUT, url=http://minio-c3.minio.io:30279/minio-java-test-3eo2m72/minio-java-test-2ab04eu?uploadId=7cecf3f4-d5a4-43a3-8e98-13c53a7a2af3&partNumber=1, headers=x-amz-copy-source: /minio-java-test-3eo2m72/minio-java-test-m5ei8t\nx-amz-copy-source-range: bytes=2048-1048575\nx-amz-copy-source-if-match: cb92d17a904ccec2e6e23b8bb66245fb\nHost: minio-c3.minio.io:30279\nAccept-Encoding: identity\nUser-Agent: MinIO (Linux; amd64) minio-java/8.0.3\nContent-MD5: 1B2M2Y8AsgTpgAmY7PhCfg==\nx-amz-content-sha256: e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855\nx-amz-date: 20210602T135612Z\nAuthorization: AWS4-HMAC-SHA256 Credential=*REDACTED*/20210602/us-east-1/s3/aws4_request, SignedHeaders=content-md5;host;x-amz-content-sha256;x-amz-copy-source;x-amz-copy-source-if-match;x-amz-copy-source-range;x-amz-date, Signature=*REDACTED*\n}\nresponse={code=400, headers=Accept-Ranges: bytes\nContent-Length: 390\nContent-Security-Policy: block-all-mixed-content\nContent-Type: application/xml\nServer: MinIO\nVary: Origin\nX-Amz-Request-Id: 1684C8756127B347\nX-Xss-Protection: 1; mode=block\nDate: Wed, 02 Jun 2021 13:56:12 GMT\n}\n >>> [io.minio.MinioClient.execute(MinioClient.java:775), io.minio.MinioClient.uploadPartCopy(MinioClient.java:4804), io.minio.MinioClient.composeObject(MinioClient.java:1431), FunctionalTest.testComposeObject(FunctionalTest.java:2120), FunctionalTest.composeObjectTests(FunctionalTest.java:2145), FunctionalTest.composeObject(FunctionalTest.java:2300), FunctionalTest.runObjectTests(FunctionalTest.java:3758), FunctionalTest.runTests(FunctionalTest.java:3783), FunctionalTest.main(FunctionalTest.java:3927)]"
}
(10/15) Running minio-js tests ... done in 48 seconds
(11/15) Running minio-py tests ... done in 2 minutes and 44 seconds
(12/15) Running s3cmd tests ... done in 16 seconds
(13/15) Running s3select tests ... done in 7 seconds
(14/15) Running security tests ... done in 0 seconds

Executed 14 out of 15 tests successfully.

Deleting image on docker hub
Deleting image locally

[harshavardhana]

LGTM ❤️

[klauspost]

Nice! LGTM