s3-seal use gensec_[un]wrap() instead of gensec_[un]seal_packet()

s3-seal use gensec_[un]wrap() instead of gensec_[un]seal_packet()

This should not make a difference for NTLMSSP as it still calls the
low level ntlmssp_[un]seal_packet() functions with the same input parameters.

If we convert the gss-api/krb5 based code to gensec we have to use
gensec_[un]wrap() as the wire format is different compared to
gensec_[un]seal_packet() there.

Andrew Bartlett

Split from another commit by Stefan Metzmacher <metze@samba.org>