Merge #18506: net: Hardcoded seeds update for 0.20

0eeb0468e7 net: Hardcoded seeds update for 0.20 (Wladimir J. van der Laan)

Pull request description:

  Update hardcoded seeds from http://bitcoin.sipa.be/seeds.txt.gz,
  according to release process.

  Output from makeseeds.py:
  ```
    IPv4   IPv6  Onion Pass
  1364173 244127   2454 Initial
  1364173 244127   2454 Skip entries with invalid address
  1129552 213117   2345 After removing duplicates
  1129548 213117   2345 Skip entries from suspicious hosts
  338216 191944   2249 Enforce minimal number of blocks
  336851 188993   2189 Require service bit 1
    6998   1520    150 Require minimum uptime
    5682   1290     89 Require a known and recent user agent
    5622   1279     89 Filter out hosts with multiple bitcoin ports
     512    146     89 Look up ASNs and limit results per ASN and per net
  ```

Top commit has no ACKs.

Tree-SHA512: ce1c2cda18dd5bd22586a5283a0877f3bd890437cc29dc1d85452ba4a4d28032f591c8b37f3329e8e649556cf83750b6949a068fad76d1773853d93014609da0

contrib/seeds/makeseeds.py

@@ -33,7 +33,8 @@ PATTERN_AGENT = re.compile(
     r"0.16.(0|1|2|3|99)|"
     r"0.17.(0|0.1|1|2|99)|"
     r"0.18.(0|1|99)|"
-    r"0.19.99"
+    r"0.19.(0|1|99)|"
+    r"0.20.99"
     r")")
 
 def parseline(line):