* providers/imap/camel-imap-search.c: New CamelFolderSearch
	subclass that just reimplements body_contains (using the IMAP
	SEARCH command). All other kinds of searching are done against the
	local summary.

	* providers/imap/camel-imap-folder.c (imap_search_by_expression):
	Use a CamelImapSearch to do searching.

	* providers/imap/camel-imap-utils.c (imap_translate_sexp, etc): No
	longer needed.

	* camel-folder-search.h: Add missing CAMEL_FOLDER_SEARCH_TYPE
	#define

svn path=/trunk/; revision=7119