make SHM enabled by default in Config

[yellowhatter]

No description provided.

[yellowhatter]

@Mallets SHM now enabled in the Config
(CI failure is transport_tcp_concurrent on Windows and not related to SHM)

[Mallets]

I would add the description

// A probing procedure for shared memory is performed upon session opening. To enable z_pub_shm to operate
// over shared memory (and to not fallback on network mode), shared memory needs to be enabled also on the
// subscriber side. By doing so, the probing procedure will succeed and shared memory will operate as expected.

that is present in the examples to the shared_memory section in the DEFAULT_CONFIG to not lose the information.

[yellowhatter]

I would add the description

// A probing procedure for shared memory is performed upon session opening. To enable z_pub_shm to operate
// over shared memory (and to not fallback on network mode), shared memory needs to be enabled also on the
// subscriber side. By doing so, the probing procedure will succeed and shared memory will operate as expected.

that is present in the examples to the shared_memory section in the DEFAULT_CONFIG to not lose the information.

done