Fix parse url bug

[xinghuayu007]

Proposed changes

The parameter 'part' of parse_url function does not support lower case, and parse protocol not right. And This function does not support parse 'port'. This PR tries to make parse_url function case insensitive and support parse 'port'.

The issue: #4451

Types of changes

What types of changes does your code introduce to Doris?
Put an x in the boxes that apply

• Bugfix (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 not work as expected)
• [] Documentation Update (if none of the other choices apply)
• [] Code refactor (Modify the code structure, format the code, etc...)

Checklist

Put an x in the boxes that apply. You can also fill these out after creating the PR. If you're unsure about any of them, don't hesitate to ask. We're here to help! This is simply a reminder of what we are going to look for before merging your code.

• [] I have create an issue on (Fix #ISSUE), and have described the bug/feature there in detail
• Compiling and unit tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works
• If this change need a document change, I have updated the document
• Any dependent changes have been merged

Further comments

If this is a relatively large or complex change, kick off the discussion at dev@doris.apache.org by explaining why you chose the solution you did and what alternatives you considered, etc...

[yangzhg]

You should better create an issue for this bug

[xinghuayu007]

You should better create an issue for this bug

Hi, I have created the issue: #4451

[xinghuayu007]

@yangzhg , could you help me to review this patch?

[Pslydhh]

+1, This looks correct to me.

[kangkaisen]

+1