Installer fails to correctly install when ossec users are in LDAP

[mjbroekman]

The installer looks for users and groups only in the local passwd and group file on Unix systems. If the ossec user and group are in LDAP, it fails to detect them and then the install dies when it tries to groupadd and useradd.

I had to hack the adduser.sh script to add getent checks to prevent it from adding the user and group that already exist.

54:    if [ `getent group ossec | wc -l` -lt 1 -a ! grep "^${GROUP}" /etc/group > /dev/null 2>&1 ]; then
70:        if [ `getent passwd ossec | wc -l` -lt 1 -a ! grep "^${U}" /etc/passwd > /dev/null 2>&1 ]; then

[ddpbsd]

I need to run this through some tests, but it might work:
ddpbsd@9a6add8