> Потом оказалось надо юзера группу нужный выставить для демона, перед запуском дождаться хотя бы сервера баз данных, ибо оттуда надо скачать данные перед запуском, нехило было бы подождать веб-сервер, потому что демон шлёт туда по http данные.

Мне кажется кто-то люто пиzдит. Зависимости в init-скриптах через Required-Start/Stop уже тыщщу лет были, а плюшки запуска процессов обеспечиваются через стандартный start-stop-daemon:

DESCRIPTION
       start-stop-daemon  is used to control the creation and termination of system-level processes.  Using one of the matching options, start-stop-daemon can be
       configured to find existing instances of a running process.

   Generic options
       -g, --group group|gid
              Change to group or gid when starting the process.

       -c, --chuid username|uid[:group|gid]
              Change  to  this  username/uid before starting the process. You can also specify a group by appending a :, then the group or gid in the same way as
              you would for the chown(1) command (user:group).  If a user is specified without a group, the primary GID for that user is used.  When  using  this
              option  you  must realize that the primary and supplemental groups are set as well, even if the --group option is not specified. The --group option
              is only for groups that the user isn't normally a member of (like adding per process group membership for generic users like nobody).

       -b, --background
              Typically  used  with  programs  that  don't detach on their own. This option will force start-stop-daemon to fork before starting the process, and
              force it into the background.  Warning: start-stop-daemon cannot check the exit status if the process fails to execute for any reason.  This  is  a
              last  resort, and is only meant for programs that either make no sense forking on their own, or where it's not feasible to add the code for them to
              do this themselves.

       -m, --make-pidfile
              Used when starting a program that does not create its own pid file. This option  will  make  start-stop-daemon  create  the  file  referenced  with
              --pidfile  and  place  the  pid  into  it  just  before  executing  the  process.  Note, the file will only be removed when stopping the program if
              --remove-pidfile is used.  Note: This feature may not work in all cases. Most notably when the program being executed forks from its main  process.
              Because of this, it is usually only useful when combined with the --background option.