** New function 'mail-header-parse-address-lax'.
Parse a string as a mail address-like string.
+** New function 'make-closure'.
+This function is used internally by the byte-compiler: calls to it are
+inserted into the generated bytecode to handle closures more
+efficiently than the old code which relied on
+'make-byte-code' instead.
+It also makes the disassembly more readable.
+
** New function 'make-separator-line'.
Make a string appropriate for usage as a visual separator line.