Convert functions to UDF plugins

Registered by Stewart Smith

Take functions in drizzled/function/ and convert them to plugins of UDFs.

This is mostly moving the source plus adding a bit of wrappers (see simple UDFs like md5 and compress for examples).

Blueprint information

Status:
Started
Approver:
None
Priority:
Low
Drafter:
Stewart Smith
Direction:
Approved
Assignee:
None
Definition:
Approved
Series goal:
Accepted for trunk
Implementation:
Good progress
Milestone target:
milestone icon ongoing
Started by
Jay Pipes

Sprints

Whiteboard

(?)

Work Items

Dependency tree

* Blueprints in grey have been implemented.

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