librpc/ndr: add flag LIBNDR_FLAG_NO_COMPRESSION
This flag can be used to change marshalling behaviour with regard to
compression.
Example: DNS packets make use of so called DNS name compression which
means that for identical strings in a DNS packet, the second string is
replaced with a reference (an offset) to the first.
Setting this flag requests to turns off the marshalling compression.
This will be used in the next commit to prevent name compression in DNS
TSIG records.
Bug: https://bugzilla.samba.org/show_bug.cgi?id=11520
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>