Fix a number of different typos across the code base

Josh Soref authored Feb 26, 2017 and Quanah Gibson-Mount committed Oct 11, 2017

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LDAP_OPT_X_TLS_NEWCTX needs a pointer to 0 as the value for
ldap_set_option when renewing a client's SSL context.

Avoids redundant files.
And update various notices