dovecot: add missing dependency libxcrypt, set strictDeps to true, fix broken test (#491890)

nixos/tests/opensmtpd.nix

@@ -149,7 +149,7 @@ import ./make-test-python.nix {
     client.wait_for_unit("network-online.target")
     smtp1.wait_for_unit("opensmtpd")
     smtp2.wait_for_unit("opensmtpd")
-    smtp2.wait_for_unit("dovecot2")
+    smtp2.wait_for_unit("dovecot")
 
     # To prevent sporadic failures during daemon startup, make sure
     # services are listening on their ports before sending requests

pkgs/by-name/do/dovecot/package.nix

@@ -21,6 +21,7 @@
   icu75,
   libexttextcat,
   libsodium,
+  libxcrypt,
   libstemmer,
   cyrus_sasl,
   nixosTests,
@@ -67,6 +68,7 @@ stdenv.mkDerivation (finalAttrs: {
     icu75
     libexttextcat
     libsodium
+    libxcrypt
     libstemmer
     cyrus_sasl.dev
   ]
@@ -180,6 +182,8 @@ stdenv.mkDerivation (finalAttrs: {
 
   doCheck = !stdenv.hostPlatform.isDarwin;
 
+  strictDeps = true;
+
   meta = {
     homepage = "https://dovecot.org/";
     description = "Open source IMAP and POP3 email server written with security primarily in mind";