support afpd service status in debian/ubuntu

afpd service status checking is not supported by the ubuntu package netatalk install;
adding service status checking one-liner (tested in Ubuntu 12.04) to correct this. Only
affects Ubuntu and Debian systems.
loosen configured module dependencies

dependencies on "stdlib" and "concat" modules were far out of date (locked to versions
several major increments behind the current stable version).  Loosened the configuration
to allow a greater range.
enhance shared volume default configuration

previously the following the shared volume default configuration details were hardcoded.
while default behavior is unchanged, the following details can be overridden:

  sharing of all user home directories as "Home Directory" can now be turned off.

  default shared volume default configuration parameters can now be configured.
Merge branch 'volume_defaults'
fix missing default volume config parameter

adding default shared volume configuration details (should have been in prior branch
commit)
Merge branch 'volume_defaults'