https://sources.debian.org/data/main/r/rust-openssl-sys/0.9.53-1/debian/patches/disable-vendor.patch
"MIT" licensed according to debian/copyright file
slightly modified to only change the vendored openssl-src dependency

--- a/Cargo.toml
+++ b/Cargo.toml
@@ -31,14 +31,11 @@
 [build-dependencies.cc]
 version = "1.0"
 
-[build-dependencies.openssl-src]
-version = "111.0.1"
-optional = true
-
 [build-dependencies.pkg-config]
 version = "0.3.9"
 
 [features]
 vendored = ["openssl-src"]
+openssl-src = []
 [target."cfg(target_env = \"msvc\")".build-dependencies.vcpkg]
 version = "0.2"

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