Due to recent changes in postgres.h cfbot is failing again.
Here's rebased patch:
v22-0001-toaster-interface.patch - PluggableTOAST API interface with reference (original) TOAST mechanics - new API is introduced but
reference TOAST is still left unchanged;
v22-0002-toaster-default.patch - Default TOAST mechanics is re-implemented using TOAST API and is plugged in as Default Toaster; v22-0003-toaster-docs.patch - PluggableTOAST API documentation package