Add CondStore

[alex-yxw]

Description

a. added the UNCHANGEDSINCE STORE modifier. b. added the MODIFIED response code that is used with an OK response to the STORE command. (It can also be used in a NO response.) c. added the CHANGEDSINCE FETCH modifier. d. added a new MODSEQ search criterion. e. defined an additional CONDSTORE parameter to SELECT/EXAMINE commands. f. added VANISHED UID FETCH modifier

Motivation and Context

Store command can send additional UNCHANGEDSINCE parameter, Store response can be parsed with MODIFIED response code, , Fetch command can send additional CHANGEDSINCE and Vanished parameter, Search command can send with MODSEQ parameter, and Select/Examine command can send additional CONDSTORE parameter, when CONDSTORE is supported. To support client to send that parameter added new classes.

How Has This Been Tested?

Added unit tests to verify

Screenshots (if appropriate):

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)
• [ ] Major release (change is NOT backward compatible with prior release)

Checklist:

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

[alex-yxw]

@fansu @jui8wang

[nvsnvikram]

Sorry, I didn't know about this pull request. Can you rebase and let me know? I will try to take a look soon. @fansu and @jui8wang , please do a final review and let me know.

[tolikbotov]

Hello. Are there any plans to merge this?