Add input vars setting

Allows for setting PHP max_input_vars which impacts how large a form can be

config/core/defaults.yml

@@ -224,6 +224,9 @@ php_opcache_memory_consumption: 256
 # The amount of memory for interned strings in Mbytes
 php_opcache_interned_strings_buffer: 16
 
+# The amount of input variables that may be accepted
+max_input_vars: 2000 
+
 # It's important for this number to be greater than the number of PHP files on a
 # server.
 # sudo find /opt/htdocs -type f -print | grep php | wc -l