Consistify svn_auth_provider_t initializations (to facilitate visual
comparison).

* subversion/libsvn_subr/ssl_server_trust_providers.c
  (ssl_server_trust_file_provider): Lose unnecessary address-of operators.

* subversion/libsvn_subr/ssl_client_cert_providers.c
  (ssl_client_cert_file_provider): Code formatting change only.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1485313 13f79535-47bb-0310-9956-ffa450edef68