And referrer is set twice!
And referrer is set twice!
I think it is funny that this misspelling hasn't been fixed after all of these years. It was typo'ed in the original http spec in 1996: https://en.wikipedia.org/wiki/HTTP_referer
But you're technically right, the best kind of right.
(btw its absolutely lovely that you put hanging out with your kids in profile
((Gush much, who?? me!???)))
/need to close my lisp
(Yes it's my April Fool's RFC.)
UK: travelling, signalling
USA: traveling, signaling
The double l serves no purpose in these.
However, there is no such UK/USA split in "referring": both use double "r".
There is a phonetic reason for that which is that the second syllable has the emphasis in "refer", unlike "traveling" and "signaling" where the leading syllable has it.
The double "rr" indicates the stressed syllable, without which "refering" and "referer" could be misread with emphasis on the first syllable, like "buffering" or "suffering"/"sufferer".
A native speaker with good intuition for spelling would never write "refering" or "referrer", even if they find "signaling" acceptable.