Fix missing inclusions.

Some platforms require including <netinet/in.h> and/or <arpa/inet.h> to
use htonl() and ntohl().  Per build failure locally.

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/9e45e03886c75dd049bcc1b063e0bf34e46a3a62

Modified Files
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src/bin/pg_basebackup/receivelog.c |   14 +++++++++-----
1 files changed, 9 insertions(+), 5 deletions(-)

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Next:	From: Heikki Linnakangas	Date: 2012-11-08 08:32:13
	Subject: pgsql: Teach pg_basebackup and pg_receivexlog to reply to serverkeepal
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	Subject: pgsql: Add URLs to document why DLLIMPORT is needed on Windows.