specs: Fall back to /var/lock if subsys doesn't exist

Signed-off-by: Euan Harris <euan.harris@citrix.com>
specs: Use LSB init-functions instead of RedHat-specific functions

Signed-off-by: Euan Harris <euan.harris@citrix.com>
xen-api-xapissl: Use LSB init-functions

Signed-off-by: Euan Harris <euan.harris@citrix.com>
specs: Add dependencies on RedHat LSB initscripts package

Signed-off-by: Euan Harris <euan.harris@citrix.com>
Merge pull request #170 from euanh/lsbinit

Adapt init scripts to use LSB helper library instead of RedHat specific library