Document new variables.
* man/newusers.8.xml, man/login.defs.5.xml,
man/login.defs.d/GID_MAX.xml, man/login.defs.d/UID_MAX.xml:
newusers uses now the GID_MAX, GID_MIN, UID_MAX, UID_MIN,
SYS_GID_MAX, SYS_GID_MIN, SYS_UID_MAX, and SYS_UID_MIN variables.
* man/groupadd.8.xml, man/login.defs.5.xml: groupadd uses now the
SYS_GID_MAX, and SYS_GID_MIN variables.
* man/login.defs.5.xml: useradd uses now the SYS_GID_MAX,
SYS_GID_MIN, SYS_UID_MAX, and SYS_UID_MIN variables.
* man/chpasswd.8.xml, man/chgpasswd.8.xml: Document the NONE crypt
method.
* man/login.defs.d/MAIL_DIR.xml: Add comment regarding useradd not
using MAIL_FILE.
* man/login.defs.d/ERASECHAR.xml, man/login.defs.d/KILLCHAR.xml,
man/login.defs.d/CONSOLE_GROUPS.xml, man/login.defs.d/ENV_HZ.xml,
man/login.defs.d/ENV_PATH.xml, man/login.defs.d/ENV_SUPATH.xml:
These variables are also used by some tools when compiled with PAM
support.
* man/login.defs.d/ENV_HZ.xml: Add note that it is only used by
sulogin when compiled with PAM support.
* man/login.defs.d/ENV_SUPATH.xml: Typos: ENV_PATH -> ENV_SUPATH,
and mention sbin in the path.
* man/login.defs.d/LOGIN_STRING.xml: Fix typo: confition ->
condition.
* man/sg.1.xml: Add CONFIGURATION section (SYSLOG_SG_ENAB).
* man/su.1.xml: ENV_HZ, LOGIN_STRING, MAIL_DIR, USERGROUPS_ENAB
are only used when su is compiled without PAM support.
* man/login.defs.5.xml: Added variables: OBSCURE_CHECKS_ENAB
PASS_ALWAYS_WARN PASS_CHANGE_TRIES SULOG_FILE SU_NAME
SU_WHEEL_ONLY SYSLOG_SG_ENAB SYSLOG_SU_ENAB.
* man/login.defs.5.xml: ENVIRON_FILE is only used when compiled
without PAM support.
* man/login.defs.5.xml: sulogin uses variables even when compiled
with PAM support.
* man/login.1.xml: ENV_HZ ENV_PATH ENV_SUPATH MAIL_DIR UMASK are
only used when login is not compiled with PAM support.
