procmail: add new recipe

Procmail can be used to create mail-servers, mailing lists, sort your
incoming mail into separate folders/files,preprocess your mail, start
any programs upon mail arrival or selectively forward certain incoming
mail automatically to someone.

Signed-off-by: Li Xin <lixin.fnst@cn.fujitsu.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>