Use vendored openssl for ssh2

Cargo.lock

@@ -260,6 +260,15 @@ dependencies = [
  "autocfg",
 ]
 
+[[package]]
+name = "openssl-src"
+version = "111.16.0+1.1.1l"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7ab2173f69416cf3ec12debb5823d244127d23a9b127d5a5189aa97c5fa2859f"
+dependencies = [
+ "cc",
+]
+
 [[package]]
 name = "openssl-sys"
 version = "0.9.67"
@@ -269,6 +278,7 @@ dependencies = [
  "autocfg",
  "cc",
  "libc",
+ "openssl-src",
  "pkg-config",
  "vcpkg",
 ]

Cargo.toml

@@ -12,4 +12,7 @@ chrono = "0.4.19"
 clap = "3.0.0-beta.4"
 log = "0.4"
 pretty_env_logger = "0.4"
-ssh2 = "0.9.1"
+
+[dependencies.ssh2]
+version = "0.9.1"
+features = ["vendored-openssl"]