net: clean up documentation for up_before_preup
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		@@ -1103,15 +1103,16 @@
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# ${IFACE} is set to the interface being brought up/down
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# ${IFVAR} is ${IFACE} converted to variable name bash allows
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#
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# For historical & compatbility reasons, preup is actually normally called in
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# the follow sequence: up ; preup ; up
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# In that case, the first up causes the kernel to initialize the device, so
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# that it is available for use in the preup function.  However, for some other
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# hardware, eg CAN devices, some configuration is needed before trying to up
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# the interface will actually work. For such harware, there are the
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# 'up_before_preup' variables, that skips the first up call.
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#up_before_preup_IFVAR=no
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#up_before_preup=no
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# For historical and compatibility reasons, preup is actually normally called
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# in the following sequence: up ; preup ; up.
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# The first up causes the kernel to initialize the device, so
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# that it is available for use in the preup function.  However, for some
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# hardware, e.g. CAN devices, some configuration is needed before trying to up
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# the interface will actually work. For such hardware, the
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# up_before_preup variables will allow skipping the first up call if set
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# to yes.
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#up_before_preup_IFVAR="NO"
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#up_before_preup="NO"
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#preup() {
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#	# Test for link on the interface prior to bringing it up.  This
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