pgsql: Mark ReplicationSlotCtl as PGDLLIMPORT.

Mark ReplicationSlotCtl as PGDLLIMPORT.

Also MyReplicationSlot, in branches where it wasn't already.

This was discussed in the thread that resulted in c572599c6, but
for some reason nobody pulled the trigger.  Now that we have another
request for the same thing, we should just do it.

Craig Ringer

Discussion: https://postgr.es/m/CAMsr+YFTsq-86MnsNng=mPvjjh5EAbzfMK0ptJPvzyvpFARuRg@mail.gmail.com
Discussion: https://postgr.es/m/345138875.20190611151943@cybertec.at

Branch
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REL9_6_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/9065fc2bd1cfd752ab57c6b8da38be423e4257bd

Modified Files
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src/include/replication/slot.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)