There's no code coloring for Apache's .htaccess file, which would be a welcome improvement.
Don't forget *.conf files in general (such as httpd.conf). The syntax is basically the same.
*** Bug 198945 has been marked as a duplicate of this bug. ***
According to this blog entry the feature is already implemented for the upcoming 7.2 release:
This is already done.
Product Version: NetBeans IDE 7.4 Beta (Build 201306141844)