pgsql: Postpone pg_timezone_initialize() until after creation of

Log Message:
-----------
Postpone pg_timezone_initialize() until after creation of postmaster.pid,
since it can take a fair amount of time and this can confuse boot scripts
that expect postmaster.pid to appear quickly.  Move initialization of SSL
library and preloaded libraries to after that point, too, just for luck.
Per reports from Tony Caduto and others.

Tags:
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REL8_0_STABLE

Modified Files:
--------------
    pgsql/src/backend/bootstrap:
        bootstrap.c (r1.198 -> r1.198.4.1)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/bootstrap/bootstrap.c.diff?r1=1.198&r2=1.198.4.1)
    pgsql/src/backend/postmaster:
        postmaster.c (r1.443.4.2 -> r1.443.4.3)

(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/postmaster/postmaster.c.diff?r1=1.443.4.2&r2=1.443.4.3)
    pgsql/src/backend/tcop:
        postgres.c (r1.440.4.2 -> r1.440.4.3)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/tcop/postgres.c.diff?r1=1.440.4.2&r2=1.440.4.3)
    pgsql/src/backend/utils/misc:
        guc.c (r1.252.4.1 -> r1.252.4.2)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/misc/guc.c.diff?r1=1.252.4.1&r2=1.252.4.2)