qemu-system-i386: -vnc localhost:0,to=99,id=default: Invalid parameter 'to'

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4db14629c38611061fc19ec6927405923de84f08 is the first bad commit
commit 4db14629c38611061fc19ec6927405923de84f08
Author: Gerd Hoffmann <email address hidden>
Date:   Tue Sep 16 12:33:03 2014 +0200

    vnc: switch to QemuOpts, allow multiple servers
    
    This patch switches vnc over to QemuOpts, and it (more or less
    as side effect) allows multiple vnc server instances.
    
    Signed-off-by: Gerd Hoffmann <email address hidden>

:040000 040000 70020c79b463eaff4b91c8c7f985240d1d1914f0 354a3a125e7b82a1699ce4e0cfc5055662bd3466 M      include
:100644 100644 0b4f131936052ed6062ba4b2b9434da0c2cce959 963305c26917a930f37d916df66b319d6558d281 M      qmp.c
:040000 040000 e7933d52124ae48100893eed8e14cbe46f80b936 30fa5966f5c8362d6db6730a7091bbde7780d4d8 M      ui
:100644 100644 9fb32c13df1c14daf8304184c6503d16bff7afce 983259bc9f7064b446da358a316a31a31731a223 M      vl.c