[PATCH 10/14] Allow walsender's to connect to a specific database

Currently the decision whether to connect to a database or not is made by
checking whether the passed "dbname" parameter is "replication". Unfortunately
this makes it impossible to connect a to a database named replication...

This is useful for future walsender commands which need database interaction.
---
src/backend/postmaster/postmaster.c | 7 ++++--
.../libpqwalreceiver/libpqwalreceiver.c | 4 ++--
src/backend/replication/walsender.c | 27 ++++++++++++++++++----
src/backend/utils/init/postinit.c | 5 ++++
src/bin/pg_basebackup/pg_basebackup.c | 4 ++--
src/bin/pg_basebackup/pg_receivexlog.c | 4 ++--
src/bin/pg_basebackup/receivelog.c | 4 ++--
7 files changed, 41 insertions(+), 14 deletions(-)