Update netpgp package from version 20090525 to 20090531.

CHANGES 1.99.7 -> 1.99.8

+ get rid of __ops_malloc_passphrase() - strdup() works just as well
+ generalise __ops_seckey_forget() to become __ops_forget(), give it a size
  parameter, and make it work on things other than secret keys (passphrases
  for instance)
+ minor struct field enum renaming
+ minor function call renaming
+ add ops_io_t struct to hold pointers to IO streams, and pass it down
  where necessary

CHANGES 1.99.6 -> 1.99.7

+ added to the regression tests
+ get rid of some magic constants, replace with more obvious names
+ zero out the memory used for a passphrase before freeing it in one place

CHANGES 1.99.5 -> 1.99.6

+ made --homedir=d consistent with POLS. Default is $HOME/.gnupg, and
  if a directory is specified with --homedir=d, the directory containing
  conf file and keyrings is taken to be "d".

CHANGES 1.99.4 -> 1.99.5

+ Luke Mewburn completely overhauled the auto tools infrastructure
+ changed signature (hah!) of some netpgp file management prototypes to
  use const char * for file names and user ids, not char * - suggested by
  christos
+ change some of the openpgpsdk display functions to return integer values,
  and send those values back from the netpgp functions - suggested by
  christos
+ rather than passing a shedload of variables to netpgp_init(), get rid
  of them, and set variables using the netpgp_[gs]etvar() interface
+ replace some magic constants with descriptive names
+ use a netpgp variable to skip userid checks if necessary
+ add ability to allow coredumps via --coredumps if (a) you have taken
  leave of your sanity, and (b) you have some magical persistent
  storage which doesn't spare sectors, and (c) you know how to remove
  a file securely
+ bumped library version on NetBSD to 1.0 for interface changes

(agc)