Use this rcat template on mainspace redirects only.
This redirect category (rcat) template populates Category:Redirects from RFCs and Category:Printworthy redirects by default. In 2003, efforts were begun to support the Wikimedia Foundation's goal of increasing access and availability of Wikipedia articles in printed versions. Mainspace redirects from RFCs are usually suitable for a printed version. In other words such redirects are generally printworthy. See below for how to tag those few redirects that are unprintworthy.
Please do not alter the printworthy settings of this rcat without first notifying the Version 1.0 Editorial Team, who are responsible for any and all materials, including redirects, that go into a printed version of Wikipedia.
Add this rcat to a redirect in the following manner:
Template {{Redirect category shell}} may be used to add as many appropriate rcats as needed, usually from one to seven, along with their parameters, to a redirect. For more information see the documentation on its template page. This rcat may also tag a redirect individually:
#REDIRECT [[(target article title)]]
{{R from RFC}}
{{R printworthy}}
|printworthy=no – By default, this template tags and categorizes redirects as printworthy. Use the printworthy parameter to subdue this behavior and populate Category:Unprintworthy redirects in the following manner:
{{Redirect category shell|
{{R from RFC|printworthy=no}}
{{R unprintworthy}}
}}