Different name conventions for models and newforms

[anonymous]

forms.CharField and models.CharField parameter max length is named differently in forms and models

models.CharField - maxlength
forms.CharField - max_length

This is really bad practice to follow. It looks like other names (both in forms and models) uses _ to separate names.
Hence, max_length must be used in models.

I know it breaks backward compatiblity, but still must be cleaned out.

[Gary Wilson <gary.wilson@…>]

dup of #2101.