Merge branch '2.2' into 3.0

# Conflicts:
#	gns3server/controller/__init__.py
#	gns3server/crash_report.py
#	gns3server/handlers/api/controller/node_handler.py
#	gns3server/utils/images.py

gns3server/crash_report.py

@@ -83,13 +83,17 @@ class CrashReport:
             # Don't send log records as events.
             sentry_logging = LoggingIntegration(level=logging.INFO, event_level=None)
 
-            sentry_sdk.init(
-                dsn=CrashReport.DSN,
-                release=__version__,
-                ca_certs=cacert,
-                default_integrations=False,
-                integrations=[sentry_logging],
-            )
+            try:
+                sentry_sdk.init(
+                    dsn=CrashReport.DSN,
+                    release=__version__,
+                    ca_certs=cacert,
+                    default_integrations=False,
+                    integrations=[sentry_logging],
+                )
+            except Exception as e:
+                log.error("Crash report could not be sent: {}".format(e))
+                return
 
             tags = {
                 "os:name": platform.system(),