rust: Fix cargo SSL errors.

Cargo uses its own vendored libcurl which it statically links
against. This patches the build configuration to set
CURL_CA_BUNDLE and CURL_CA_PATH.

I am still unsure as to why this broke, why this only affects
KISS with OpenSSL 3.0.0, etc. Will see if the next rust release
improves this else will open a bug report upstream.

Closes #339

extra/rust/build

@@ -1,5 +1,8 @@
 #!/bin/sh -e
 
+rm -f vendor/curl-sys/.cargo-checksum.json
+patch -p1 < fix-curl.patch
+
 # Instruct the compiler to trim absolute paths in resulting binaries and instead
 # change them to relative paths ($PWD/... ./...).
 export RUSTFLAGS="$RUSTFLAGS --remap-path-prefix=$PWD=."

extra/rust/checksums

@@ -2,3 +2,4 @@ aec85a7c1f40b7a40818a58ae13632f8a12cfaa4d3e2a10957d0e9d16dfdd556
 c2de24eb3e524c0fdd1e8116f578c103035da1ece1e4c06efab67999180eefe8
 5cffd160f5daac521652ee67c62947c0d66bdc8e5ebf7dc93114cdff9a934b0b
 9a26b73e578227d111b221932d7cbeaf4b41f27a0f7597a49efb81e2bd0791f9
+f68fbed74118bff6df74dbdd1507e646e6627c95444fde90a6bb66b51b677cff

extra/rust/patches/fix-curl.patch

@@ -0,0 +1,33 @@
+diff --git a/Cargo.lock b/Cargo.lock
+index 085aae3..ccedf97 100644
+--- a/Cargo.lock
++++ b/Cargo.lock
+@@ -873,7 +873,7 @@ dependencies = [
+ name = "curl-sys"
+ version = "0.4.45+curl-7.78.0"
+ source = "registry+https://github.com/rust-lang/crates.io-index"
+-checksum = "de9e5a72b1c744eb5dd20b2be4d7eb84625070bb5c4ab9b347b70464ab1e62eb"
++checksum = "d8f1e2562c5784ad3348906a9c7e2e435c8bc5c8796a4398d322456d9a2710c1"
+ dependencies = [
+  "cc",
+  "libc",
+diff --git a/vendor/curl-sys/.cargo-checksum.json b/vendor/curl-sys/.cargo-checksum.json
+new file mode 100644
+index 0000000..b3a3efe
+--- /dev/null
++++ b/vendor/curl-sys/.cargo-checksum.json
+@@ -0,0 +1 @@
++{"files":{},"package":"d8f1e2562c5784ad3348906a9c7e2e435c8bc5c8796a4398d322456d9a2710c1"}
+diff --git a/vendor/curl-sys/build.rs b/vendor/curl-sys/build.rs
+index 7b66756..a7c7122 100644
+--- a/vendor/curl-sys/build.rs
++++ b/vendor/curl-sys/build.rs
+@@ -109,6 +109,8 @@ fn main() {
+         .include("curl/lib")
+         .include("curl/include")
+         .define("BUILDING_LIBCURL", None)
++        .define("CURL_CA_BUNDLE", "\"/etc/ssl/cert.pem\"")
++        .define("CURL_CA_PATH", "\"/etc/ssl/certs\"")
+         .define("CURL_DISABLE_CRYPTO_AUTH", None)
+         .define("CURL_DISABLE_DICT", None)
+         .define("CURL_DISABLE_GOPHER", None)

extra/rust/sources

@@ -2,3 +2,4 @@ https://static.rust-lang.org/dist/rustc-VERSION-src.tar.xz
 https://static.rust-lang.org/dist/2021-07-29/rust-std-1.54.0-x86_64-unknown-linux-musl.tar.xz?no-extract
 https://static.rust-lang.org/dist/2021-07-29/rustc-1.54.0-x86_64-unknown-linux-musl.tar.xz?no-extract
 https://static.rust-lang.org/dist/2021-07-29/cargo-1.54.0-x86_64-unknown-linux-musl.tar.xz?no-extract
+patches/fix-curl.patch

extra/rust/version

@@ -1 +1 @@
-1.55.0 1
+1.55.0 3