update Makefile.in and configure.in and config.h.in to support PAM
./configure --with-pam
make
corresponding generated configure script generated by autoconf
changes to support PAM session pam_access.so and pam_limits.so module when starting daemonize with another than root.

Some examples of configuration:
-- /etc/security/access.conf --

# deny access expect for localuser locally
- : ALL EXCEPT localuser : LOCAL
# User "localuser" should be allowed to get access via daemonize .. LOCAL.
+ : localuser : daemonize : LOCAL

-- !/etc/security/access.conf --

-- /etc/pam.d/daemonize --

auth required pam_access.so
session required pam_limits.so

-- ! /etc/pam.d/daemonize --

-- /etc/security/limits.conf --

localuser - core unlimited
localuser - rtprio unlimited
localuser - nice unlimited
localuser - memlock unlimited
localuser hard nofile 2048
localuser soft nofile 2048

-- ! /etc/security/limits.conf --


Signed-off-by: Eric Keller <keller.eric@gmail.com>