Rustdocs directly link to doc.rust-lang.org, breaking offline docs #97918
Description
The docs for the standard library often link to other rust documentation items, like the reference or "Rust by Example". However, most/many of these links link to the versions hosted at doc.rust-lang.org. This causes problems when browsing a version of the docs hosted somewhere else, for instance the offline version installed via rustup. In that case, the linked version is also hardcoded and might not even match the one of the offline docs.
Example (core::arch::asm)
Some pages will link to the docs on the same host, like the one for the keyword pub.
There are currently about 1044 matches for doc.rust-lang.org in .rustup/toolchains/stable-x86_64-unknown-linux-gnu/share/doc/rust/html:
$ grep -Frc "doc.rust-lang.org" . --exclude="print.html" | cut -d: -f2 | awk 'BEGIN{c=0} {c+=$0} END{print c}'
1044