[FS#1008] Teach procd about mounpoint or path dependencies

[LEDE Bugs]

A new Flyspray task has been opened.  Details are below. 

User who did this - Nathaniel Wesley Filardo (nwf) 

Attached to Project - LEDE Project
Summary - Teach procd about mounpoint or path dependencies
Task Type - Bug Report
Category - Base system
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - Low
Priority - Very Low
Reported Version - Trunk
Due in Version - Undecided
Due Date - Undecided
Details - So far as I have been able to discern, there is no mechanism for blocking a service's start until a particular filesystem has been mounted (or directory exists).  The motivation is that I run collectd (via luci-statistics, natch) on my router and persist the data sets (rrds) across reboot by having them written to a USB stick.  However, early in boot, collectd sometimes (often? always?) manages to come up before the mount completes, and so touches the on-router flash, creating its basedir and datadir and the rrds and so on.

More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=1008