Solly Ross 66115e5323 Fix broken if statement in lib/tls on ZSH
When using ZSH, the line `if [[ (!$cert && !$key && $ca) ]]` fails
due to a syntax error.  Instead of checking the variables as a boolean,
we can simply check if they have a non-zero length.  This works in ZSH.

Change-Id: I171ed10a8c0af354e82bd6119508a0c44b6bcd9c
2014-03-24 14:05:08 -04:00
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tls
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