scd: PC/SC reader selection by partial string match.
* scd/apdu.c (open_pcsc_reader_direct): Partial string match. * scd/pcsc-wrapper.c (handle_open): Likewise.
(backport from 2.1 commit 01a2a61bc4b34817c4216888265f65d59a33dad3)
The card reader name by PC/SC service might include USB bus,
which varies (on some platform like GNU/Linux). Thus, it's
better to match partial string.
Original patch was submitted by anstein. I changed it to fallback to
the first reader if no match found.