Add separate relink command

Also rejigged install to accomodate FreeBSD, and update before installing.

install

@@ -3,6 +3,25 @@
 # Adapted from Junegunn Choi (junegunn.c@gmail.com)
 # https://github.com/junegunn/dotfiles/blob/master/install
 
+BASE=$(pwd)
+IS_MAC=0
+IS_LINUX=0
+IS_FREEBSD=0
+
+echo "Ensuring packages/system are up to date; please enter password for sudo if requested."
+case $(uname -s) in
+    Darwin) IS_MAC=1
+            brew update
+            ;;
+    Linux) IS_LINUX=1
+           sudo apt update
+           ;;
+    FreeBSD) IS_FREEBSD=1
+             sudo pkg upgrade
+             ;;
+    *) echo "Unknown OS" ;;
+esac
+
 cd "$(dirname "${BASH_SOURCE[0]}")" || exit 1
 
 MISSING=0
@@ -16,6 +35,7 @@ check_command() {
     echo "Found $FOUND."
   fi
 }
+
 COMMANDS="git realpath curl"
 for cmd in $COMMANDS ; do
   check_command $cmd
@@ -25,18 +45,6 @@ if [ $MISSING -ne 0 ] ; then
 fi
 unset COMMANDS MISSING
 
-BASE=$(pwd)
-IS_MAC=0
-IS_LINUX=0
-if [ "$(uname -s)" == 'Darwin' ]; then
-  echo "Running on macOS"
-  IS_MAC=1
-fi
-if [ "$(uname -s)" == 'Linux' ]; then
-  echo "Running on Linux"
-  IS_LINUX=1
-fi
-
 # RC files
 
 mkdir -pv bak
@@ -117,6 +125,10 @@ if [ $IS_LINUX == 1 ] ; then
   sudo apt build-dep mu4e
 fi
 
+if [ $IS_FREEBSD == 1 ] ; then
+  sudo pkg install gmake vim rsync texinfo xsel-conrad
+fi
+
 # Just add these, for now.
 ADD_ONLY="python tmux sbcl opam gohugo erlang elixir clojure"
 for plugin in $ADD_ONLY ; do