Fixes <http://issues.guix.gnu.org/45202>.
* gnu/services/security-token.scm (pcscd-shepherd-service): Look for
pcscd.pid in /run instead of /var/run.
Reported by Raffael Stocker <r.stocker@mnet-mail.de>.
Fixes: <https://bugs.gnu.org/32478>.
* gnu/services/security-token.scm (pcscd-activation): Idempotently create the
/var/lib/pcsc symlink so that it does not fail when it already exists.
