pgsql: Rework libpq threaded SIGPIPE handling to avoid interference with - Mailing list pgsql-committers

Log Message:
-----------
Rework libpq threaded SIGPIPE handling to avoid interference with
calling applications.  This is done by blocking sigpipe in the libpq
thread and using sigpending/sigwait to possibily discard any sigpipe we
generated.

Modified Files:
--------------
    pgsql:
        configure (r1.409 -> r1.410)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/configure.diff?r1=1.409&r2=1.410)
        configure.in (r1.387 -> r1.388)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/configure.in.diff?r1=1.387&r2=1.388)
    pgsql/doc/src/sgml:
        libpq.sgml (r1.169 -> r1.170)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/libpq.sgml.diff?r1=1.169&r2=1.170)
    pgsql/doc/src/sgml/ref:
        copy.sgml (r1.60 -> r1.61)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/copy.sgml.diff?r1=1.60&r2=1.61)
    pgsql/src/interfaces/libpq:
        fe-connect.c (r1.290 -> r1.291)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/libpq/fe-connect.c.diff?r1=1.290&r2=1.291)
        fe-print.c (r1.55 -> r1.56)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/libpq/fe-print.c.diff?r1=1.55&r2=1.56)
        fe-secure.c (r1.57 -> r1.58)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/libpq/fe-secure.c.diff?r1=1.57&r2=1.58)
        libpq-fe.h (r1.113 -> r1.114)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/libpq/libpq-fe.h.diff?r1=1.113&r2=1.114)
        libpq-int.h (r1.96 -> r1.97)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/libpq/libpq-int.h.diff?r1=1.96&r2=1.97)