Remove libs that are not here on FreeBSD.

--- hints/freebsd.sh.orig	2020-12-28 16:57:44 UTC
+++ hints/freebsd.sh
@@ -88,6 +88,8 @@ case "$osvers" in
 	esac
 	libswanted=`echo $libswanted | sed 's/ malloc / /'`
 	libswanted=`echo $libswanted | sed 's/ bind / /'`
+	libswanted=`echo $libswanted | sed 's/ dl / /'`
+	libswanted=`echo $libswanted | sed 's/ c / /'`
 	# iconv gone in Perl 5.8.1, but if someone compiles 5.8.0 or earlier.
 	libswanted=`echo $libswanted | sed 's/ iconv / /'`
 	d_setregid='define'
@@ -102,6 +104,10 @@ case "$osvers" in
 	        ;;
 	esac
 	libswanted=`echo $libswanted | sed 's/ malloc / /'`
+	libswanted=`echo $libswanted | sed 's/ bind / /'`
+	libswanted=`echo $libswanted | sed 's/ dl / /'`
+	libswanted=`echo $libswanted | sed 's/ iconv / /'`
+	libswanted=`echo $libswanted | sed 's/ c / /'`
 	;;
 esac