plproxy - plproxy: doc update: add ver tags to few places

Log Message:
-----------
doc update: add ver tags to few places

Modified Files:
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plproxy/doc:
syntax.txt (r1.9 -> r1.10)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/plproxy/plproxy/doc/syntax.txt?r1=1.9&r2=1.10)
todo.txt (r1.10 -> r1.11)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/plproxy/plproxy/doc/todo.txt?r1=1.10&r2=1.11)