contrib: drop absolute paths => simpler conditions

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>

contrib/alpine/finit.d/available/syslogd.conf

@@ -1,2 +1,2 @@
 # Start syslogd as soon as possible, should always run
-service [S12345] /sbin/syslogd -n -- Syslog daemon
+service [S12345] syslogd -n -- Syslog daemon

contrib/debian/finit.d/available/sshd.conf

@@ -1,2 +1,2 @@
 # Start SSH daemon as soon as basic networking comes up
-service [2345] <net/lo/up> /usr/sbin/sshd -D -- OpenSSH daemon
+service [2345] <net/lo/up> sshd -D -- OpenSSH daemon

contrib/debian/finit.d/available/xdm.conf

@@ -1,4 +1,4 @@
 # Here we use XDM since it has few dependencies (relatively speaking).
 # It is also an example of a service without a -- description.
-# service [3] /usr/sbin/lxdm -- Lightweight Login Manager
-service [3] xdm -nodaemon
+# service [3] lxdm -- Lightweight Login Manager
+service [3] xdm -nodaemon -- X Display Manager

contrib/void/finit.d/available/crond.conf

@@ -1 +1 @@
-service [2345] <pid/sbin/syslogd> /usr/sbin/crond -f -S -c /etc/crontabs -- Cron daemon
+service [2345] <pid/syslogd> crond -f -S -c /etc/crontabs -- Cron daemon