build script: Added a comment why I/O APIC is enabled in VirtualBox by default.
whonixcheck: increased Tor socks port reachability test timeout from 5 to 10 as per https://www.whonix.org/forum/index.php/topic,129.0.html
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minor space
Changed keyserver (suggested by tempest @ https://www.whonix.org/forum/index.php/topic,140.0.html) from hkp://2eghzlv2wwcq7u7y.onion to hkp://qdigse2yzvuglcix.onion as used by torbirdy and https://raw.github.com/ioerror/torbirdy/master/gpg.conf.; comments