[RT #1084]

 935.   [bug]           inet_pton failed to reject leading zeros.

turned off.

Two new error codes.  Also push back the last token, if it makes
sense to do so, so that it gets printed in the error message using
RETTOK macro, rather than straight return or RETERR.

passed into dns_name_toregion().  This is effectively free, and reduces the
number of calls to set_offsets() and dns_name_clone() in name compression.

is turned off

been replaced with isc_lex_getmastertoken().

Add sanity checks to rdata types where the length cannot legally be zero.

own CVS tree will help minimize CVS conflicts.  Maybe not.
Blame Graff for getting me to trim all trailing whitespace.

Mostly, several functions that take pointers as arguments, almost
always char * pointers, had those pointers qualified with "const".
Those that returned pointers to previously const-qualified arguments
had their return values qualified as const.  Some structure members
were qualified as const to retain that attribute from the variables
from which they were assigned.

The macro DE_CONST is used to deal with a handful of very special
places where something is qualified as const but really needs to have
its const qualifier removed.

rdata.c now defines macros for the prototypes of the basic rdata functions,
and all of the lib/dns/rdata/**/*.c files now use them.

Some minor integer-compatibility issues.  (IE, ~0x03 is a signed int,
so assigning it to an unsigned int should use a cast.  The type of an
enum member is int, so there are some conversion issues there, too.)

A pointers-to-function should not be cast to a pointer-to-object.

Variables should not be named for C reserved identifiers.

One or two set-but-not-used variables removed.

Minor other ISC style cleanups.

                      is NULL then you need to preserve the 'rdata' until
                      you have finished using the structure as there may be
                      references to the associated memory.  If 'mctx' is non
                      NULL it is guarenteed that there are no references to
                      to memory addsociated with 'rdata'.

                      dns_rdata_freestruct() must be called if 'mctx' was
                      non NULL and may safely be called if 'mctx' was NULL.

Finish implementing 153 for IN specific types.
naptr_35.h some of the lengths should be 8 bits.

dns_[de]compress_setmethods instead of separately in every caller

                        Added:
                                isc_buffer_base(b)          (pointer)
                                isc_buffer_current(b)       (pointer)
                                isc_buffer_active(b)        (pointer)
                                isc_buffer_used(b)          (pointer)
                                isc_buffer_length(b)            (int)
                                isc_buffer_usedlength(b)        (int)
                                isc_buffer_consumedlength(b)    (int)
                                isc_buffer_remaininglength(b)   (int)
                                isc_buffer_activelength(b)      (int)
                                isc_buffer_availablelength(b)   (int)
                        Removed:
                                ISC_BUFFER_USEDCOUNT(b)
                                ISC_BUFFER_AVAILABLECOUNT(b)
                                isc_buffer_type(b)
                        Changed names:
                                isc_buffer_used(b, r) ->
                                        isc_buffer_usedregion(b, r)
                                isc_buffer_available(b, r) ->
                                        isc_buffer_available_region(b, r)
                                isc_buffer_consumed(b, r) ->
                                        isc_buffer_consumedregion(b, r)
                                isc_buffer_active(b, r) ->
                                        isc_buffer_activeregion(b, r)
                                isc_buffer_remaining(b, r) ->
                                        isc_buffer_remainingregion(b, r)

                        Buffer types were removed, so the ISC_BUFFERTYPE_*
                        macros are no more, and the type argument to
                        isc_buffer_init and isc_buffer_allocate were removed.
                        isc_buffer_putstr is now void (instead of isc_result_t)
                        and requires that the caller ensure that there
                        is enough available buffer space for the string.

build a table of them using gen.c.  This means the names are stored twice,
but that will change in the near future.  This will speed up number to text
conversions for rdatatypes, and I plan on speeding up text->number as
well, soon.

	it will need to be freed, dns_rdata_freestruct().
	Changes to implement this.

	Added C++ support to rdatastruct.h

	as opposed to DNSSEC owner name comparisions of names.  Changed
	all rdata types that were using dns_name_compare() to use
	dns_name_rdatacompare().

	Update Copyright dates.

	converted frometext* to use gettoken()
	converted:
		result = foo();
		if (result != DNS_R_SUCCESS)
			return (result);
	to
		RETERR(foo());