IPv6 might crash if disabled on the OS level

In his message "Bug in some gemini capsule", user Y C had crashes when
connecting to IPv6 enabled capsule while IPv6 was disabled at OS level.

This raised a crash when creating the socket in netcache gemini code.
For whatever reason, the socket creation was not in the "try/catch"
section.

This should fix the issue.

CHANGELOG

@@ -11,6 +11,7 @@
 - ansicat: fixed a crash when parsing wrong hidden_url in gemini (bug #32)
 - offpunk: offpunk --version doesn’t create the cache anymore (bug #27)
 - ansicat: fix a crash with HTML without title (bug #33)
+- netcache: gemini socket code can crash when IPv6 is disabled (mailing-list)
 
 ## 2.0 - November 16th 2023
 Changes since 1.10

netcache.py

@@ -634,10 +634,10 @@ def _fetch_gemini(url,timeout=DEFAULT_TIMEOUT,interactive=True,accept_bad_ssl_ce
         # Connect to remote host by any address possible
     err = None
     for address in addresses:
-        s = socket.socket(address[0], address[1])
-        s.settimeout(timeout)
-        s = context.wrap_socket(s, server_hostname = host)
         try:
+            s = socket.socket(address[0], address[1])
+            s.settimeout(timeout)
+            s = context.wrap_socket(s, server_hostname = host)
             s.connect(address[4])
             break
         except OSError as e: