Merge pull request #128 from hindsightsoftware/user-exists-error

Checking if a user already exists during postinstall is missing the user name to check for

Author: jsuereth

src/main/resources/com/typesafe/sbt/packager/debian/postinst-useradd

@@ -1,5 +1,5 @@
 # Adding ${{user}}
-if ! id -u $1 >/dev/null 2>&1; then
+if ! id -u ${{user}} > /dev/null 2>&1; then
     echo "Creating user ${{user}} in group ${{group}}"
     useradd --system --no-create-home --gid ${{group}} --shell /bin/false ${{user}}
 fi