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Remove duplicate setting of SSL_OP_SINGLE_DH_USE option.

Commitc0a15e0 moved the setting of OpenSSL's SSL_OP_SINGLE_DH_USE optioninto a new subroutine initialize_dh(), but forgot to remove it from whereit was. SSL_CTX_set_options() is a trivial function, amounting indeed tojust "ctx->options |= op", hence there's no reason to contort the code orbreak separation of concerns to avoid calling it twice. So separating theDH setup from disabling of old protocol versions is a good change, but weneed to finish the job.Noted while poking into the question of SSL session tickets.

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src/backend/libpq
- be-secure-openssl.c

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`‎src/backend/libpq/be-secure-openssl.c‎`

Lines changed: 1 addition & 3 deletions

Original file line number	Diff line number	Diff line change
`@@ -286,9 +286,7 @@ be_tls_init(bool isServerStart)`
`286`	`286`	`}`
`287`	`287`
`288`	`288`	`/* disallow SSL v2/v3 */`
`289`		`-SSL_CTX_set_options(context,`
`290`		`-SSL_OP_SINGLE_DH_USE \|`
`291`		`-SSL_OP_NO_SSLv2 \|SSL_OP_NO_SSLv3);`
	`289`	`+SSL_CTX_set_options(context,SSL_OP_NO_SSLv2 \|SSL_OP_NO_SSLv3);`
`292`	`290`
`293`	`291`	`/* set up ephemeral DH and ECDH keys */`
`294`	`292`	`if (!initialize_dh(context,isServerStart))`

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Commitf352f91

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`‎src/backend/libpq/be-secure-openssl.c‎`

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