BUG #13661: Using word LIMIT

The following bug has been logged on the website:

Bug reference:      13661
Logged by:          Danilenko Andrey
Email address:      kmursk@rambler.ru
PostgreSQL version: 9.4.1
Operating system:   Windows
Description:

Word LIMIT is a clause of SQL-statement and could not be used as a name of
column. But it is possible to create table with this column-name. And for
all that such column-name transforms in upper case. That is bug, because
there shoud not be possibility to use name LIMIT at all with clause CREATE
TABLE. And moreover there shoud not be implicit case-transformation