Switch to SRFI-1.

doc/d-utils.md

@@ -257,24 +257,6 @@ pair consisting of symbol created by interning the string of
 non-whitespace characters before the first whitespace character and
 the string with the rest of the line.
 
-## util-list [module]
-
-    (import util-list)
-
-This module implements basic list functionality which is common in
-most scheme implementations.
-
-### filter [procedure]
-
-    (filter pred?
-            lst)
-
-* ```pred?``` - procedure accepting any value and returning #t or #f
-* ```lst``` - list to be filtered
-
-Returns a list containing only elements matching given ```pred?```
-predicate.
-
 ## util-proc [module]
 
     (import util-proc)
@@ -428,12 +410,14 @@ sent to the address stored within.
     (send-mail body-lines
                #:from (from #f)
                #:to to
-               #:subject subject)
+               #:subject subject
+               #:headers (headers (quote ())))
 
 * ```body-lines``` - lines of the email
 * ```from``` - email address from string
 * ```to``` - email address to string
 * ```subject``` - email subject string
+* ```headers``` - list of headers to add
 
 Sends email using mail(1) command. The arguments ```#:to``` and
 ```#:subject``` are mandatory. Argument ```#:from``` is optional.