Plug&Play support
This is not the best solution, but focus on smallest code change.
Changes:
1. Add detect_readers() to reader opts, this adds new readers to the end
of the readers list until list is full.
2. Add sc_ctx_detect_readers() that calls readers' detect_readers().
3. Fixup pcsc_lock() so that it reconnect to the card and report proper
error so caller may be notified if session was lost.
4. Allow context to be created without readers.
5. Call sc_ctx_detect_readers() from PKCS#11 C_GetSlotList with NULL_PTR.
6. Allow no reader at detect_card, as reader my be removed.
7. Since I broke ABI, I updated the external module version requirement
to match OpenSC version. In the future a separate version should be
maintained for each interface, this should be unrelated to the package
version.
Alon
---
svn merge -r 3480:3505 https://www.opensc-project.org/svn/opensc/branches/alonbl/pnp
M src/tools/opensc-tool.c
M src/pkcs11/pkcs11-global.c
M src/pkcs11/slot.c
M src/libopensc/reader-pcsc.c
M src/libopensc/internal-winscard.h
M src/libopensc/ctx.c
M src/libopensc/reader-ctapi.c
M src/libopensc/libopensc.exports
M src/libopensc/reader-openct.c
M src/libopensc/opensc.h
