Changes to pkcs1_signature_prefix interface.

ChangeLog

pkcs1-rsa-md5.c

pkcs1-rsa-sha1.c

pkcs1-rsa-sha256.c

pkcs1-rsa-sha512.c

pkcs1.c

pkcs1.h

rsa-md5-sign.c

rsa-md5-verify.c

rsa-sha1-sign.c

rsa-sha1-verify.c

rsa-sha256-sign.c

rsa-sha256-verify.c

rsa-sha512-sign.c

rsa-sha512-verify.c

testsuite/pkcs1-test.c