Bug#11745920/Bug#21287: "SSL connection error" is not helpful! (ssl-verify-server-cert=true vs localhos)

SSL errors on client and now more specific to aid end-user
with debugging. Also restructures error handling for
compliance with SSL docs.

include/violite.h:
  new_VioSSLConnectorFd/sslaccept/sslconnect return more elaborate status
libmysql/errmsg.c:
  SSL errors now extended, more specific
mysql-test/r/openssl_1.result:
  SSL errors now extended, more specific
sql-common/client.c:
  Do more detailed error reporting for setup, connect, and
  server cert verifying phases.
sql/sql_acl.cc:
  sslaccept() signature has changed
vio/viossl.c:
  Save the error code and return it to callers of sslaccept
  and sslconnect.
vio/viosslfactories.c:
  new_VioSSLConnectorFd(): return error code to caller