* man/chfn.1.xml: Uses CHFN_AUTH, CHFN_RESTRICT, LOGIN_STRING.

* man/chfn.1.xml: Uses CHFN_AUTH, CHFN_RESTRICT, LOGIN_STRING.
* man/chgpasswd.8.xml: Uses ENCRYPT_METHOD, MAX_MEMBERS_PER_GROUP,
  MD5_CRYPT_ENAB, SHA_CRYPT_MIN_ROUNDS (SHA_CRYPT_MAX_ROUNDS).
* man/chpasswd.8.xml: Switch to using entities for ENCRYPT_METHOD,
  MD5_CRYPT_ENAB, SHA_CRYPT_MIN_ROUNDS (SHA_CRYPT_MAX_ROUNDS).
* man/chsh.1.xml: Uses CHSH_AUTH, LOGIN_STRING.
* man/expiry.1.xml: Does not use any login.defs parameter.
* man/gpasswd.1.xml: Uses ENCRYPT_METHOD, MAX_MEMBERS_PER_GROUP,
  MD5_CRYPT_ENAB, SHA_CRYPT_MIN_ROUNDS.
* man/login.defs.5.xml: Added CHSH_AUTH.
* man/login.defs.5.xml: Cross reference -> cross references.
* man/login.defs.5.xml: chfn only uses CHFN_AUTH when no_pam.
* man/login.defs.5.xml: chsh uses CHSH_AUTH, not CHFN_AUTH.
* man/login.defs.d/CHSH_AUTH.xml: Added.
* man/login.defs.5.xml: chsh uses parameters only when no_pam.
* man/login.defs.5.xml: expiry does not use CONSOLE_GROUPS, even
  if linked in the binary.
* man/newusers.8.xml: Uses ENCRYPT_METHOD, MAX_MEMBERS_PER_GROUP,
  MD5_CRYPT_ENAB, PASS_MAX_DAYS, PASS_MIN_DAYS, PASS_WARN_AGE,
  SHA_CRYPT_MIN_ROUNDS, UMASK.