Bump buildroot to 2019.02

bsp/buildroot/package/postgresql/postgresql.service

@@ -3,7 +3,7 @@ Description=PostgreSQL database server
 After=network.target
 
 [Service]
-Type=forking
+Type=notify
 
 # start timeout disabled because initdb may run a little
 # longer (eg. 5 minutes on RaspberryPi)
@@ -12,13 +12,17 @@ TimeoutStartSec=0
 User=postgres
 Group=postgres
 
+StandardOutput=syslog
+StandardError=syslog
 SyslogIdentifier=postgres
 PIDFile=/var/lib/pgsql/postmaster.pid
 
 ExecStartPre=/bin/sh -c "if [ ! -f /var/lib/pgsql/PG_VERSION ]; then /usr/bin/pg_ctl initdb -D /var/lib/pgsql; fi"
-ExecStart=/usr/bin/pg_ctl start -D /var/lib/pgsql -w -l /var/lib/pgsql/logfile
-ExecReload=/usr/bin/pg_ctl reload -D /var/lib/pgsql
-ExecStop=/usr/bin/pg_ctl stop -D /var/lib/pgsql -m fast
+ExecStart=/usr/bin/postgres -D /var/lib/pgsql
+ExecReload=/usr/bin/kill -HUP $MAINPID
+KillMode=mixed
+KillSignal=SIGINT
+TimeoutSec=0
 
 [Install]
 WantedBy=multi-user.target