Log Message:
-----------
Document that Cygwin does not support OpenSSL.
Modified Files:
--------------
pgsql/doc/src/sgml:
installation.sgml (r1.316 -> r1.317)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/installation.sgml?r1=1.316&r2=1.317)