bootstrap: apt was mangling stdin

When executed "cat bootstrap.sh | bash", apt-get mangled stdin. The script would terminate at the end of the if block containing apt-get (that seems to be as much as bash read from the pipe) and the remainder of the script was output to the console. This was very weird.

Ensuring that apt-get and git have their stdins redirected from /dev/null seems to fix the problem.

see #224

setup/bootstrap.sh

@@ -16,27 +16,34 @@ if [[ $EUID -ne 0 ]]; then
 	exit
 fi
 
-# Go to root's home directory.
-cd
-
 # Clone the Mail-in-a-Box repository if it doesn't exist.
 if [ ! -d mailinabox ]; then
 	echo Installing git . . .
-	apt-get -q -q install -y git
+	DEBIAN_FRONTEND=noninteractive apt-get -q -q install -y git < /dev/null
+	echo
 
 	echo Downloading Mail-in-a-Box . . .
-	git clone -b $TAG --depth 1 https://github.com/mail-in-a-box/mailinabox 2> /dev/null
-	cd mailinabox
+	git clone \
+		-b $TAG --depth 1 \
+		https://github.com/mail-in-a-box/mailinabox \
+		$HOME/mailinabox \
+		< /dev/null 2> /dev/null
+
+	echo
+fi
+
+# Change directory to it.
+cd $HOME/mailinabox
 
-# If it does exist, update it.
-else
+# Update it.
+if [ "$TAG" != `git describe` ]; then
 	echo Updating Mail-in-a-Box to $TAG . . .
-	cd mailinabox
 	git fetch
 	if ! git checkout -q $TAG; then
 		echo "Update failed. Did you modify something in `pwd`?"
 		exit
 	fi
+	echo
 fi
 
 # Start setup script.