fix: fix failing test when crypt is missing.

In 3.13 crypt is gone and there is no replacement as it's supplied by
a .so as _crypt.

Don't hardcode the crypt method in the array, add it (next to last)
only if crypt was detected.

Author: rouilj

roundup/password.py

@@ -395,7 +395,10 @@ class Password(JournalPassword):
     1
     """
 
-    deprecated_schemes = ["SSHA", "SHA", "MD5", "crypt", "plaintext"]
+    deprecated_schemes = ["SSHA", "SHA", "MD5", "plaintext"]
+    if crypt:
+        # place just before plaintext if crypt is available
+        deprecated_schemes.insert(-1, "crypt")
     experimental_schemes = ["PBKDF2S5"]
     known_schemes = ["PBKDF2"] + experimental_schemes + \
         deprecated_schemes