Merge pull request #231 from linuxserver/universal-tshoot-apt

standardize apt-get, update formatting

root/etc/cont-init.d/95-apt-get

@@ -0,0 +1,5 @@
+#!/usr/bin/with-contenv bash
+
+if [ -f /usr/bin/apt ]; then
+    apt-get update
+fi

root/etc/cont-init.d/95-tshoot-config

@@ -2,7 +2,6 @@
 
 ## Ubuntu
 if [ -f /usr/bin/apt ]; then
-    apt-get update
     apt-get install --no-install-recommends -y \
         dnsutils \
         net-tools \