Warn users to add pyenv init --path to ~/.profile

To facilitate migration

libexec/pyenv-init

@@ -61,6 +61,7 @@ function main() {
     ;;
   "print")
     init_dirs
+    warn_path
     print_env
     print_completion
     print_shell_function
@@ -132,6 +133,13 @@ function print_path() {
   esac
 }
 
+function warn_path() {
+  if ! perl -ls0x3A -e 'while (<>) { chomp; ($_ eq $d) && exit 0; } exit 1' -- -d="${PYENV_ROOT}/shims" <<<"$PATH" ; then
+    echo 'echo '\''WARNING: `pyenv init -` no longer sets PATH.'\'
+    echo 'echo '\''Run `pyenv init` to see the necessary changes to make to your configuration.'\'
+  fi
+}
+
 function print_env() {
   case "$shell" in
   fish )