ConfdAsyncUDPServer: handle signals at read time
ConfdAsyncUDPServer: handle signals at read time

Currently if a signal is delivered during an attempted read, an
exception is logged in the logfile. There is no need for this, so we
handle this case explicitely.

Signed-off-by: Guido Trotter <f62ca4d5358bdaeef0e50e57f9f7e231de63727e@google.com>
Reviewed-by: Michael Hanselmann <68b67885ff74281219b4a4be33cc20fd45078d7c@google.com>

bitemyapp/ganeti,mbakke/ganeti,onponomarev/ganeti,dimara/ganeti,dimara/ganeti,ganeti-github-testing/ganeti-test-1,leshchevds/ganeti,andir/ganeti,apyrgio/ganeti,ganeti/ganeti,leshchevds/ganeti,ganeti/ganeti,grnet/snf-ganeti,leshchevds/ganeti,yiannist/ganeti,andir/ganeti,ganeti-github-testing/ganeti-test-1,bitemyapp/ganeti,yiannist/ganeti,apyrgio/snf-ganeti,apyrgio/snf-ganeti,mbakke/ganeti,onponomarev/ganeti,andir/ganeti,ganeti/ganeti,grnet/snf-ganeti,mbakke/ganeti,apyrgio/ganeti,yiannist/ganeti