Order, Allow, Deny
: essas são chamadas de diretivas do apache, e essas três pertencem ao módulo mod_authz_host
(a partir do Apache 2.1 e versões posteriores). Em princípio, as diretivas do apache são insensíveis a maiúsculas e minúsculas, portanto ambas são válidas. Consulte aqui :
Directives in the configuration files are case-insensitive, but arguments to directives are often case sensitive. Lines that begin with the hash character "#" are considered comments, and are ignored. Comments may not be included on the same line as a configuration directive. White space occurring before a directive is ignored, so you may indent directives for clarity. Blank lines are also ignored.