Add openssl recipe and fix nghttp2 recipe

recipes/nghttp2/recipe.toml

@@ -4,7 +4,7 @@ tar = "https://github.com/nghttp2/nghttp2/releases/download/v1.37.0/nghttp2-1.37
 [build]
 template = "custom"
 script = """
-COOKBOOK_CONFIGURE_ARGS+=(
+COOKBOOK_CONFIGURE_FLAGS+=(
     --enable-lib-only
 )
 cookbook_configure

recipes/openssl/recipe.toml

+[source]
+git = "https://gitlab.redox-os.org/redox-os/openssl.git"
+branch = "redox"
+
+[build]
+template = "custom"
+script = """
+ARCH="${TARGET%%-*}"
+COOKBOOK_CONFIGURE="${COOKBOOK_SOURCE}/Configure"
+COOKBOOK_CONFIGURE_FLAGS=(
+    no-shared
+    no-dgram
+    "redox-${ARCH}"
+    --prefix="/"
+)
+cookbook_configure
+rm -rfv "${COOKBOOK_STAGE}/"{share,ssl}
+"""