zcash_address: Show feature flags in documentation

components/zcash_address/Cargo.toml

@@ -14,6 +14,10 @@ rust-version = "1.52"
 categories = ["cryptography::cryptocurrencies", "encoding"]
 keywords = ["zcash", "address", "sapling", "unified"]
 
+[package.metadata.docs.rs]
+all-features = true
+rustdoc-args = ["--cfg", "docsrs"]
+
 [dependencies]
 bech32 = "0.9"
 bs58 = { version = "0.5", features = ["check"] }

components/zcash_address/src/lib.rs

@@ -1,3 +1,8 @@
+#![cfg_attr(docsrs, feature(doc_cfg))]
+#![cfg_attr(docsrs, feature(doc_auto_cfg))]
+// Catch documentation errors caused by code changes.
+#![deny(rustdoc::broken_intra_doc_links)]
+
 mod convert;
 mod encoding;
 mod kind;