standardize the default shell

I do not know of a need to have the default shell be a build-time
configurable setting. All *nix systems I am aware of have /bin/sh as a
default posix compatible shell.
If some systems running OpenRC do not make that assumption about
/bin/sh, I will consider bringing this back, so feel free to open an
issue.

etc/rc.in

@@ -1,4 +1,4 @@
-#!@SHELL@
+#!/bin/sh
 # Copyright (c) 2007-2015 The OpenRC Authors.
 # See the Authors file at the top-level directory of this distribution and
 # https://github.com/OpenRC/openrc/blob/master/AUTHORS

etc/rc.shutdown.in

@@ -1,4 +1,4 @@
-#!@SHELL@
+#!/bin/sh
 # Copyright (c) 2007-2015 The OpenRC Authors.
 # See the Authors file at the top-level directory of this distribution and
 # https://github.com/OpenRC/openrc/blob/master/AUTHORS

mk/scripts.mk

@@ -19,7 +19,7 @@ _PKG_SED:=		$(shell ${_PKG_SED_SH})
 _LCL_SED_SH=		if test "${PREFIX}" = "${LOCAL_PREFIX}"; then echo "-e 's:@LOCAL_PREFIX@::g'"; else echo "-e 's:@LOCAL_PREFIX@:${LOCAL_PREFIX}:g'"; fi
 _LCL_SED:=		$(shell ${_LCL_SED_SH})
 
-SED_REPLACE=		-e 's:@SHELL@:${SH}:g' -e 's:@LIB@:${LIBNAME}:g' -e 's:@SYSCONFDIR@:${SYSCONFDIR}:g' -e 's:@LIBEXECDIR@:${LIBEXECDIR}:g' -e 's:@PREFIX@:${PREFIX}:g' -e 's:@BINDIR@:${BINDIR}:g' -e 's:@SBINDIR@:${SBINDIR}:g' ${_PKG_SED} ${_LCL_SED}
+SED_REPLACE=		-e 's:@LIB@:${LIBNAME}:g' -e 's:@SYSCONFDIR@:${SYSCONFDIR}:g' -e 's:@LIBEXECDIR@:${LIBEXECDIR}:g' -e 's:@PREFIX@:${PREFIX}:g' -e 's:@BINDIR@:${BINDIR}:g' -e 's:@SBINDIR@:${SBINDIR}:g' ${_PKG_SED} ${_LCL_SED}
 
 # Tweak our shell scripts
 %.sh: %.sh.in

scripts/halt.in

@@ -1,4 +1,4 @@
-#!@SHELL@
+#!/bin/sh
 
 option_arg=
 poweroff_arg=

scripts/poweroff.in

@@ -1,4 +1,4 @@
-#!@SHELL@
+#!/bin/sh
 
 option_arg=
 poweroff_arg=

scripts/rc-sstat.in

@@ -1,4 +1,4 @@
-#!@SHELL@
+#!/bin/sh
 # Copyright (c) 2015 The OpenRC Authors.
 # See the Authors file at the top-level directory of this distribution and
 # https://github.com/OpenRC/openrc/blob/master/AUTHORS

scripts/reboot.in

@@ -1,4 +1,4 @@
-#!@SHELL@
+#!/bin/sh
 
 option_arg=
 poweroff_arg=

scripts/shutdown.in

@@ -1,4 +1,4 @@
-#!@SHELL@
+#!/bin/sh
 
 shutdown_arg=
 while getopts :akrhPHfFnct: opt; do

sh/binfmt.sh.in

@@ -1,4 +1,4 @@
-#!@SHELL@
+#!/bin/sh
 # This is a reimplementation of the systemd binfmt.d code to register
 # misc binary formats with the kernel.
 #

sh/cgroup-release-agent.sh.in

@@ -1,4 +1,4 @@
-#!@SHELL@
+#!/bin/sh
 # This is run by the kernel after the last task is removed from a
 # control group in the openrc hierarchy.
 

sh/gendepends.sh.in

@@ -1,4 +1,4 @@
-#!@SHELL@
+#!/bin/sh
 # Shell wrapper to list our dependencies
 
 # Copyright (c) 2007-2015 The OpenRC Authors.

sh/init-early.sh.Linux.in

@@ -1,4 +1,4 @@
-#!@SHELL@
+#!/bin/sh
 # Copyright (c) 2007-2015 The OpenRC Authors.
 # See the Authors file at the top-level directory of this distribution and
 # https://github.com/OpenRC/openrc/blob/master/AUTHORS

sh/init.sh.BSD.in

@@ -1,4 +1,4 @@
-#!@SHELL@
+#!/bin/sh
 # Copyright (c) 2007-2015 The OpenRC Authors.
 # See the Authors file at the top-level directory of this distribution and
 # https://github.com/OpenRC/openrc/blob/master/AUTHORS

sh/init.sh.GNU-kFreeBSD.in

@@ -1,4 +1,4 @@
-#!@SHELL@
+#!/bin/sh
 # Copyright (c) 2007-2015 The OpenRC Authors.
 # See the Authors file at the top-level directory of this distribution and
 # https://github.com/OpenRC/openrc/blob/master/AUTHORS

sh/init.sh.GNU.in

@@ -1,4 +1,4 @@
-#!@SHELL@
+#!/bin/sh
 # Copyright (c) 2007-2015 The OpenRC Authors.
 # See the Authors file at the top-level directory of this distribution and
 # https://github.com/OpenRC/openrc/blob/master/AUTHORS

sh/init.sh.Linux.in

@@ -1,4 +1,4 @@
-#!@SHELL@
+#!/bin/sh
 # Copyright (c) 1999-2007 Gentoo Foundation
 # Copyright (c) 2007-2009 Roy Marples <roy@marples.name>
 # Released under the 2-clause BSD license.

sh/migrate-to-run.sh.in

@@ -1,4 +1,4 @@
-#!@SHELL@
+#!/bin/sh
 # Copyright (c) 2012-2015 The OpenRC Authors.
 # See the Authors file at the top-level directory of this distribution and
 # https://github.com/OpenRC/openrc/blob/master/AUTHORS

sh/openrc-run.sh.in

@@ -1,4 +1,4 @@
-#!@SHELL@
+#!/bin/sh
 # Shell wrapper for openrc-run
 
 # Copyright (c) 2007-2015 The OpenRC Authors.