Support more characters in link local addresses

Implements [Feature #17524]

Author: jeremyevans

lib/resolv.rb

@@ -2464,7 +2464,7 @@ class IPv6
     Regex_8HexLinkLocal = /\A
       [Ff][Ee]80
       (?::[0-9A-Fa-f]{1,4}){7}
-      %[0-9A-Za-z]+
+      %[-0-9A-Za-z._~]+
       \z/x
 
     ##
@@ -2478,7 +2478,7 @@ class IPv6
         |
         :((?:[0-9A-Fa-f]{1,4}(?::[0-9A-Fa-f]{1,4})*)?)
       )?
-      :[0-9A-Fa-f]{1,4}%[0-9A-Za-z.]+
+      :[0-9A-Fa-f]{1,4}%[-0-9A-Za-z._~]+
       \z/x
 
     ##

test/resolv/test_addr.rb

@@ -28,6 +28,10 @@ def test_valid_ipv6_link_local_address
     assert_match(Resolv::IPv6::Regex, "FE80:2:3:4:5:6:7:8%EM1", bug17112)
     assert_match(Resolv::IPv6::Regex, "FE80::20D:3AFF:FE7D:9760%ETH0", bug17112)
     assert_match(Resolv::IPv6::Regex, "FE80::1%EM1", bug17112)
+
+    bug17524 = "[ruby-core:101992]"
+    assert_match(Resolv::IPv6::Regex, "FE80::20D:3AFF:FE7D:9760%ruby_3.0.0-1", bug17524)
+    assert_match(Resolv::IPv6::Regex, "fe80::1%ruby_3.0.0-1", bug17524)
   end
 
   def test_valid_socket_ip_address_list