Clarify that [patch] can also use sources that are not crates.io
Clarify that [patch] can also use sources that are not crates.io

eminence/cargo,rust-lang/cargo,tshepang/cargo,tshepang/cargo,rust-lang/cargo,rustyhorde/cargo,rustyhorde/cargo,eminence/cargo,tsurai/cargo,rustyhorde/cargo,rust-lang/cargo,vojtechkral/cargo,tshepang/cargo,nipunn1313/cargo,nipunn1313/cargo,tsurai/cargo,nipunn1313/cargo,tsurai/cargo,rust-lang/cargo,rustyhorde/cargo,eminence/cargo,tsurai/cargo,tshepang/cargo,vojtechkral/cargo,eminence/cargo,vojtechkral/cargo,nipunn1313/cargo,vojtechkral/cargo,tsurai/cargo