openssh: fix paths in {ssh,sshd}_config to ease future upgrades. (#329)

Also add a post-install script, fix_openssh_config_paths.sh, which
makes the required changes to both ssh_config and sshd_config in
/boot/system/settings/ssh/ if needed. Original files are saved with
a .bak suffix. Moreover, default config files are also available in
/system/data/openssh/ as ssh_config.default and sshd_config.default.

net-misc/openssh/openssh-7.1p1.recipe

@@ -16,7 +16,7 @@ ssh-keyscan, ssh-keygen and sftp-server."
 HOMEPAGE="http://www.openssh.com/"
 COPYRIGHT="2005-2015 Tatu Ylonen et al."
 LICENSE="OpenSSH"
-REVISION="4"
+REVISION="5"
 SOURCE_URI="http://ftp.fr.openbsd.org/pub/OpenBSD/OpenSSH/portable/openssh-$portVersion.tar.gz"
 CHECKSUM_SHA256="fc0a6d2d1d063d5c66dffd952493d0cda256cad204f681de0f84ef85b2ad8428"
 PATCHES="sshd_config.patch
@@ -25,7 +25,10 @@ PATCHES="sshd_config.patch
 
 ARCHITECTURES="x86_gcc2 x86 x86_64"
 
-ADDITIONAL_FILES="sshd_keymaker.sh"
+ADDITIONAL_FILES="
+	sshd_keymaker.sh
+	fix_openssh_config_paths.sh
+	"
 
 PROVIDES="
 	openssh = $portVersion compat >= 5
@@ -44,8 +47,10 @@ PROVIDES="
 	"
 REQUIRES="
 	haiku
+	cmd:grep
 	cmd:login
 	cmd:passwd
+	cmd:sed
 	lib:libcrypto
 	lib:libedit
 	lib:libncurses
@@ -74,12 +79,17 @@ BUILD_PREREQUIRES="
 
 GLOBAL_WRITABLE_FILES="
 	settings/ssh directory keep-old
+	settings/ssh/ssh_config keep-old
+	settings/ssh/sshd_config keep-old
 	"
 USER_SETTINGS_FILES="
 	settings/ssh directory
+	settings/ssh/ssh_config template data/openssh/ssh_config.default
+	settings/ssh/sshd_config template data/openssh/sshd_config.default
 	"
 POST_INSTALL_SCRIPTS="
 	$relativePostInstallDir/sshd_keymaker.sh
+	$relativePostInstallDir/fix_openssh_config_paths.sh
 	"
 sshdUserHomeDir="/packages/$portVersionedName-$REVISION/.self/$relativeDataDir/openssh/empty"
 PACKAGE_USERS="
@@ -125,6 +135,25 @@ INSTALL()
 	make install-nokeys
 	mkdir -p $postInstallDir
 	cp -f $portDir/additional-files/sshd_keymaker.sh $postInstallDir
+	cp -f $portDir/additional-files/fix_openssh_config_paths.sh $postInstallDir
+
+	local USER_SETTINGS_DIR="`finddir B_USER_SETTINGS_DIRECTORY`"
+	sed -i \
+		-e "s| ~/\.ssh/| $USER_SETTINGS_DIR/ssh/|" \
+		$sysconfDir/ssh/ssh_config
+
+	local SYSTEM_SETTINGS_DIR="`finddir B_SYSTEM_SETTINGS_DIRECTORY`"
+	local VAR_DIR="`finddir B_SYSTEM_VAR_DIRECTORY`"
+	local LIB_DIR="`finddir B_SYSTEM_LIB_DIRECTORY`"
+	sed -i \
+		-e "s|$sysconfDir/ssh/|$SYSTEM_SETTINGS_DIR/ssh/|" \
+		-e "s|$prefix/var/run/|$VAR_DIR/run/|" \
+		-e "s|$libExecDir/openssh/|$LIB_DIR/openssh/|" \
+		$sysconfDir/ssh/sshd_config
+
+	mkdir -p $dataDir/openssh
+	cp $sysconfDir/ssh/ssh_config $dataDir/openssh/ssh_config.default
+	cp $sysconfDir/ssh/sshd_config $dataDir/openssh/sshd_config.default
 }
 
 TEST()