move prototypes around so they show up when needed

--- a/externs.h
+++ b/externs.h
@@ -327,6 +327,9 @@
 #undef xstrchr
 extern char *xstrchr __P((const char *, int));
 
+/* declarations for functions defined in lib/sh/zcatfd.c */
+extern int zcatfd __P((int, int, char *));
+
 /* declarations for functions defined in lib/sh/zread.c */
 extern ssize_t zread __P((int, char *, size_t));
 extern ssize_t zreadintr __P((int, char *, size_t));
--- a/jobs.h
+++ b/jobs.h
@@ -175,6 +175,8 @@
 extern void ignore_tty_job_signals __P((void));
 extern void default_tty_job_signals __P((void));
 
+extern void close_pgrp_pipe __P((void));
+
 #if defined (JOB_CONTROL)
 extern int job_control;
 #endif