This should fix shellcheck warning SC2004.

* pgp.keys.asc: Replace with the key used to sign v1.5.2.

Resolves: https://github.com/linux-pam/linux-pam/issues/544

bcba17939e1b1a568cd4a764534cde74d37078cc started using pam_overwrite_n()
without providing the definition to this function, which causes a build
failure.

modules/pam_timestamp/hmac_openssl_wrapper.c: include pam_inline.h

Signed-off-by: Iker Pedrosa <ipedrosa@redhat.com>

Currently translated at 100.0% (101 of 101 strings).

Translate-URL: https://translate.fedoraproject.org/projects/linux-pam/master/pa/

man/pam_item_types_std.inc.xml: In the past, PAM_TTY was used for tty
devices and $DISPLAY variables for X-based applications. With the
introduction of PAM_DISPLAY PAM_TTY should only be used for devices.

Use empty initialization of structs to minimize the memset() usage, to
reduce the amount of calls which are not sensitive.

Non trivial changes:

- pam_env:
  * erase environment variables where possible

- pam_exec:
  * erase responce on error
  * erase auth token

- pam_pwhistory:
  * erase buffers containing old passwords

- pam_selinux: skip overwriting data structure consisting of only
  pointers to insensitive data, which also gets free'd afterwards (so
  it currently does not protect against double-free or use-after-free on
  the member pointers)

- pam_unix: erase cipher data in more places

- pam_userdb: erase password hashes