Split installation/removal parts in prepost-action scripts.

There are two scripts that can be used now:
	- prepost-inst: for pre/post actions at installation.
	- prepost-rm: for pre/post actions at removal.

--HG--
extra : convert_revision : 5e054758f549f5c81693b825795fbb36e2d5513a

templates/initng-ifiles.prepost-inst

@@ -8,9 +8,9 @@ export PATH="/bin:/sbin:/usr/bin:/usr/sbin"
 # $4 = version
 
 case "$2" in
-preinst)
+pre)
 	;;
-postinst)
+post)
 	echo "Running $3-$4 post-installation command..."
 	if [ "$1" = "NOTSET" ]; then
 		run_cmd="/sbin/genrunlevel --all"

templates/kernel.prepost-inst

@@ -8,9 +8,9 @@ export PATH="/bin:/sbin:/usr/bin:/usr/sbin"
 # $4 = version
 
 case "$2" in
-preinst)
+pre)
 	;;
-postinst)
+post)
 	echo "Running $3-$4 post-installation command..."
 	if [ "$1" = "NOTSET" ]; then
 		if $(mount|grep "^/proc" 2>&1 >/dev/null); then

templates/shadow.prepost-inst

@@ -44,9 +44,9 @@ _EOF
 }
 
 case "$2" in
-preinst)
+pre)
 	;;
-postinst)
+post)
 	if [ "$1" = "NOTSET" ]; then
 		run_cmd="pwconv"
 	else
@@ -58,7 +58,7 @@ postinst)
 
 	if [ ! -f ./etc/shadow ]; then
 		echo "Enabling shadow passwords..."
-	       	${run_cmd}
+		${run_cmd}
 	fi
 	;;
 esac