Title: #67: UTIL: Unset O_NONBLOCK for ldap connection
I don't quite understand what the fix is about nor how it relates to gnutls. Is it
about wrong handling of the client socket? To know whether the issue is on the gnutls
server, I'll need more information from the server side (gnutls version, a server run
with GNUTLS_DEBUG_LEVEL set to 6 or more, and a capture of the session).
See the full comment at https://github.com/SSSD/sssd/pull/67#issuecomment-256587092