Minor mostly comments typo fixes

Signed-off-by: Gilles Espinasse <g.esp@free.fr>

config.in

 #
-# config.in	Configure.sh source for the net-tools.
+# config.in	configure.sh source for the net-tools.
 #		This file contains the definition of what the support
 #		library contains.  Most of all, it defines which types
 #		of address families and hardware we know of.

configure.sh

 #!/usr/bin/env bash
 #
-# Configure.sh	Generates interactively a config.h from config.in
+# configure.sh	Generates interactively a config.h from config.in
 #
 # net-tools	A collection of programs that form the base set of the
 #		NET-3 Networking Distribution for the LINUX operating
@@ -37,7 +37,7 @@ CONFIG=config.h
 MAKECONFIG=config.make
 
 
-[ -z "$BASH" ] && { echo "Configure requires bash" 1>&2; exit 1; }
+[ -z "$BASH" ] && { echo "configure.sh requires bash" 1>&2; exit 1; }
 
 cat <<EOF
 
@@ -114,7 +114,7 @@ function int()
 }
 
   #
-  # Make sure we start out with a clean slate.
+  # Make sure we start out with a clean state.
   #
   > config.new
   > ${CONFIG}