git: Try to start usbd(8) only if it actually exists.

[Sascha Wildner]

commit 6ac0b84876c52f35eb16eb87de7b25a3e89db588
Author: Sascha Wildner <saw at online.de>
Date:   Tue Mar 18 19:21:31 2014 +0100

    Try to start usbd(8) only if it actually exists.
    
    It is specific to the old USB stack so we can remove the rc script
    once we don't offer it anymore. For now, just check if it is there
    before starting.

Summary of changes:
 etc/rc.d/usbd | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/6ac0b84876c52f35eb16eb87de7b25a3e89db588


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