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* no-pth.c, Makefile.am: Removed. * call-scd.c: Seirialized all scdaeom access when using Pth. * cache.c: Made the cache Pth-thread-safe. (agent_unlock_cache_entry): New. * findkey.c (unprotect): Unlock the returned cache value. * command.c (cmd_get_passphrase): Ditto. * gpg-agent.c (main): Register pth_read/write with Assuan.