Merge bitcoin/bitcoin#23354: Introduce new V4 format addrman

d891ae7681 Introduce new V4 format addrman (Pieter Wuille)

Pull request description:

  #23306 effectively changed the on-disk format in an incompatible way: old deserializers cannot deal with multiple entries for the same IP.

  Introduce a `V4_MULTIPORT` format, and increment the compatibility base, so that old versions correctly recognize it as an incompatible future version, rather than corruption.

ACKs for top commit:
  naumenkogs:
    ACK d891ae7681
  ajtowns:
    utACK d891ae7681
  vasild:
    ACK d891ae7681

Tree-SHA512: de2153beb59152504ee0656dd0cc0b879b09136eb07e3ce0426d2fea778adfabacebbce5cf1a9a65dc99ad4e99cda42ab26743fe672fb82a9fbfec49c4cccb4d

test/functional/feature_addrman.py

@@ -18,7 +18,7 @@ from test_framework.util import assert_equal
 def serialize_addrman(
     *,
     format=1,
-    lowest_compatible=3,
+    lowest_compatible=4,
     net_magic="regtest",
     bucket_key=1,
     len_new=None,
@@ -75,7 +75,7 @@ class AddrmanTest(BitcoinTestFramework):
             expected_msg=init_error(
                 "Unsupported format of addrman database: 1. It is compatible with "
                 "formats >=111, but the maximum supported by this version of "
-                f"{self.config['environment']['PACKAGE_NAME']} is 3.: (.+)"
+                f"{self.config['environment']['PACKAGE_NAME']} is 4.: (.+)"
             ),
             match=ErrorMatch.FULL_REGEX,
         )