Dirk modifide the share-locking for DNS lookups

CHANGES

@@ -7,6 +7,11 @@
                                   Changelog
 
 
+Daniel (12 October)
+- Dirk Manske made the share locking around DNS lookups slightly different to
+  allow the share system's DNS lookups to run somewhat more
+  independent/faster.
+
 Daniel (9 October)
 - Lachlan O'Dea fixed a resume problem: "If I set CURLOPT_RESUME_FROM, perform
   an HTTP download, then reset CURLOPT_RESUME_FROM to 0, the next download

RELEASE-NOTES

@@ -19,6 +19,7 @@ This release includes the following changes:
 
 This release includes the following bugfixes:
 
+ o share-locking during DNS lookups was modified
  o resume was not possible to switch off properly once enabled
  o fixed the ipv4 connect code when a DNS entry has multiple IPs
  o now checks subjectAltNames when matching certs
@@ -67,6 +68,6 @@ advice from friends like these:
  Kimdon, Dominick Meglio, Markus Moeller, Giuseppe Attardi, James MacMillan,
  Neil Spring, Siddhartha Prakash Jain, Jon Turner, Vincent Bronner, Shard,
  Jeremy Friesner, Florian Schoppmann, Neil Dunbar, Frank Ticheler, Lachlan
- O'Dea
+ O'Dea, Dirk Manske
  
         Thanks! (and sorry if I forgot to mention someone)