SGET, SSYNCH now fallback to GET, SYNCH ...

... for all copy_from bodies with encrypt="true", when TLS layer is
established.

Server side (cf-serverd): Removed SGET and SSYNCH from the TLS
encapsulated protocol, these commands are now unknown in that
case. Needed to split the command parsing loop to two parts, one for
classic, one for TLS protocol. Also cleaned up more not-needed anymore
commands, like AUTH and CLASSES (very old protocol), CAUTH,
SAUTH. Updated the protocol_test to check only the CLASSIC protocol
parser.

Client side (libcfnet): Fix SSYNCH, SGET protocol commands. Whenever
"secure" operations are requested and TLS is being used, the
"non-secure" command versions take place, thus avoiding double
encryption.

All testsuite passes now.
Allow the testall script to run either from OBJDIR or OBJDIR/tests/acceptance