Patch from Scott McKellar:

Patch from Scott McKellar:

1. Corrected a few minor typos in the header.

2. Made the client_message_handler function static, since no other source
  file references it by name.

3. Moved several things from the header to the implementation file, of
  which all are internal details not referenced elsewhere:

-- The macros MESSAGE_LIST_HEAD and MESSAGE_LIST_ITEM
-- The declaration for struct message_list_struct, along with the
  associated typedefs

git-svn-id: svn://svn.open-ils.org/OpenSRF/trunk@1524 9efc2488-bf62-4759-914b-345cdb29e865