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These two new parameters, named sslminprotocolversion and sslmaxprotocolversion, allow to respectively control the minimum and the maximum version of the SSL protocol used for the SSL connection attempt. The default setting is to allow any version for both the minimum and the maximum bounds, causing libpq to rely on the bounds set by the backend when negotiating the protocol to use for an SSL connection. The bounds are checked when the values are set at the earliest stage possible as this makes the checks independent of any SSL implementation. Author: Daniel Gustafsson Reviewed-by: Michael Paquier, Cary Huang Discussion: https://postgr.es/m/4F246AE3-A7AE-471E-BD3D-C799D3748E03@yesql.se
The PostgreSQL contrib tree
---------------------------
This subtree contains porting tools, analysis utilities, and plug-in
features that are not part of the core PostgreSQL system, mainly
because they address a limited audience or are too experimental to be
part of the main source tree. This does not preclude their
usefulness.
User documentation for each module appears in the main SGML
documentation.
When building from the source distribution, these modules are not
built automatically, unless you build the "world" target. You can
also build and install them all by running "make all" and "make
install" in this directory; or to build and install just one selected
module, do the same in that module's subdirectory.
Some directories supply new user-defined functions, operators, or
types. To make use of one of these modules, after you have installed
the code you need to register the new SQL objects in the database
system by executing a CREATE EXTENSION command. In a fresh database,
you can simply do
CREATE EXTENSION module_name;
See the PostgreSQL documentation for more information about this
procedure.