Compiler notes during installation

[kilianmh]

sbcl gives the following 2 compiler notes:

; file: .../quicklisp/http.lisp
; in: DEFUN PROCESS-HEADER
;     (ERROR "Unable to process HTTP header")
; 
; note: deleting unreachable code

; file: .../quicklisp/dist.lisp
; in: DEFUN CONFIG-FILE-INITARGS
;     (INTERN (FUNCALL QL-DIST::*INITARG-CASE-CONVERTER* STRING) 'KEYWORD)
; 
; note: deleting unreachable code