Simplify utility module configuration

For `setopt CORRECT`. Let the user uncomment a line with the `setopt`
directly in the configuration file, instead of having a flag variable
for it.

modules/utility/init.zsh

@@ -2,14 +2,6 @@
 # Utility Functions and Options
 #
 
-#
-# Command Correction
-#
-
-if [[ ${zcorrection} == 'true' ]]; then
-  setopt CORRECT
-fi
-
 #
 # ls Colours
 #

templates/zimrc

@@ -38,9 +38,9 @@ zprompt_theme='steeef'
 # Utility
 #
 
-# Uncomment to enable command correction prompts; 'setopt CORRECT'
+# Uncomment to enable command correction prompts
 # See: http://zsh.sourceforge.net/Doc/Release/Options.html#Input_002fOutput
-#zcorrection='true'
+#setopt CORRECT
 
 #
 # Input