Description of problem:
lircd can't create /var/run/lirc/lirc.pid

Version-Release number of selected component (if applicable):
lirc-0.9.0-0.1.pre1.fc15.x86_64

How reproducible:
starting lirc_serial

Steps to Reproduce:
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Actual results:
/var/run/lirc/lirc.pid can't created because the folder /var/run/lirc/ doesn't exits

Expected results:
lird should create /var/run/lirc/lirc.pid

Additional info:
The problem is that systemd create /var/run as tmpfs. So after a restart the folder /var/run/lirc/ is missing.
I solved the problem as i create a /etc/tmpfiles.d/lirc.conf file.

lirc.conf:
d /var/run/lirc 0755 root root

With that file the systemd 'systemd-tmpfiles-setup.service' create a folder /var/run/lirc/ at startup. 
And lircd can create /var/run/lirc/lirc.pid.