Thanks hata_ph, that's great. I changed the conf file back to how it had been previously, and it started without complaint this time. So, progress. However, I still get a 403 error. There must be permission issues with the root directory, that being with /var/www/htdocs-lighttpd. Should I "chmod 0755" this directory and those that lead to it (and its contents)?
PS, here is my /etc/group and /etc/passwd, as requested:
root:x:0:root
bin:x:1:root,bin
daemon:x:2:root,bin,daemon
sys:x:3:root,bin,adm
adm:x:4:root,adm,daemon
tty:x:5:
disk:x:6:root,adm,mark
lp:x:7:lp,mark
mem:x:8:
kmem:x:9:
wheel:x:10:root
floppy:x:11:mark
mail:x:12:mail
news:x:13:news
uucp:x:14:uucp
man:x:15:
dialout:x:16:uucp,mark
audio:x:17:mark
video:x:18:mark
cdrom:x:19:mark
games:x:20:mark
slocate:x:21:mark
utmp:x:22:
smmsp:x:25:smmsp
tape:x:26:
mysql:x:27:
rpc:x:32:
sshd:x:33:sshd
gdm:x:42:
shadow:x:43:
ftp:x:50:
oprofile:x:51:
apache:x:80:
messagebus:x:81:
haldaemon:x:82:
plugdev:x:83:mark
power:x:84:mark
netdev:x:86:mark
pop:x:90:pop
scanner:x:93:mark
nobody:x:98:nobody
nogroup:x:99:
users:x:100:mark
console:x:101:
lock:x:120:
burning:x:121:
mark:x:1000:
avahi:x:214:
lighttpd:x:208:
GNU nano 2.3.0 File: /etc/passwd
root:x:0:0::/root:/bin/bash
bin:x:1:1:bin:/bin:/bin/false
daemon:x:2:2:daemon:/sbin:/bin/false
adm:x:3:4:adm:/var/log:/bin/false
lp:x:4:7:lp:/var/spool/lpd:/bin/false
sync:x:5:0:sync:/sbin:/bin/sync
shutdown:x:6:0:shutdown:/sbin:/sbin/shutdown
halt:x:7:0:halt:/sbin:/sbin/halt
mail:x:8:12:mail:/:/bin/false
news:x:9:13:news:/usr/lib/news:/bin/false
uucp:x:10:14:uucp:/var/spool/uucppublic:/bin/false
operator:x:11:0:operator:/root:/bin/bash
games:x:12:100:games:/usr/games:/bin/false
ftp:x:14:50::/home/ftp:/bin/false
smmsp:x:25:25:smmsp:/var/spool/clientmqueue:/bin/false
mysql:x:27:27:MySQL:/var/lib/mysql:/bin/false
rpc:x:32:32:RPC portmap user:/:/bin/false
sshd:x:33:33:sshd:/:/bin/false
gdm:x:42:42:GDM:/var/lib/gdm:/bin/false
oprofile:x:51:51:oprofile:/:/bin/false
apache:x:80:80:User for Apache:/srv/httpd:/bin/false
messagebus:x:81:81:User for D-BUS:/var/run/dbus:/bin/false
haldaemon:x:82:82:User for HAL:/var/run/hald:/bin/false
pop:x:90:90:POP:/:/bin/false
nobody:x:99:99:nobody:/:/bin/false
mark:x:1000:1000:Mark Grieveson:/home/mark:/bin/bash
avahi:x:214:214:Avahi User:/dev/null:/bin/false
lighttpd:x:208:208::/var/www: