Nah, it's not really skeuomorphic because it doesn't really imitate, at least until recently. The authoritative format was plain text, and that was intended to

Nah, it's not really skeuomorphic because it doesn't really imitate, at least until recently. The authoritative format was plain text, and that was intended to be printable (originally probably on what were in effect computer-driven typewriters), and if you want to have printable plain text, you kindof have to have headers and footers on every "page" (and page break characters between pages in order to accomodate different paper sizes, which are actually there if you look closely at the plain text version). The HTML version of those RFCs does not so much imitate the format as it is a rendering that is supposed to reproduce the authoritative document as true to the original as possible, so as to not risk any unintended changes in meaning, while adding some of the benefits of having hypertext.