Register SRFI 37 with the implementation of SRFI 7.

scheme/more-packages.scm

@@ -729,7 +729,8 @@
     (define available-srfis
       '(srfi-1 srfi-2 srfi-5 srfi-6 srfi-7 srfi-8 srfi-9
 	srfi-11 srfi-13 srfi-14 srfi-16 srfi-17 srfi-23
-	srfi-25 srfi-26 srfi-27 srfi-28 srfi-30 srfi-31))
+	srfi-25 srfi-26 srfi-27 srfi-28 srfi-30 srfi-31
+	srfi-37))
 
     ; Some SRFI's redefine Scheme variables.
     (define shadowed