[linux/init.d]: Use jsvc's -user option instead of sudo su to start jsvc

[fpauser]

[..] Jsvc is a daemon process so it should be started as root and the -user parameter allows to downgrade to an unprivilegded user. [..]

As issues #12 and #16 could be fixed in jsvc-1.0.10. See https://issues.apache.org/jira/browse/DAEMON-242 and discussion in #20.

[kares]

we're bundling 1.0.10 I've compiled and tried to verify if the isssue got fixed but somehow with no luck:

• daemon starts fine (using sudo -u kares) under root user but adding jsvc -user kares instead of the sudo fails to start with a Cannot locate Java Home message
• daemon starts fine under non-root user but simply changing jsvc -user kares makes it "unusable" - all seems fine except the application does not start nor a pid file gets created

thus it's still very confusing, tested on Ubuntu 11.10 32-bit (3.0.0-17-generic-pae)
as far as I remember it was not-working but printing something else on Debian GNU/Linux 6.0.1 (squeeze)

I previously thought we can do a check using a dummy daemon executable during the configuration, but the second case which is most likely to be the main scenario makes it kind of indistinguishable from a successful daemon start.

[ansel1]

I've also resorted to using the RUN_USER/sudo, but ran into another problem: I'm not seeing how to set the environment for trinidad. the sudo call in /etc/init.d/trinidad wipes out any existing env I set up.