Makefile: use ?= for $BROWSER
authorWolfgang Bumiller <w.bumiller@proxmox.com>
Thu, 3 Mar 2016 09:01:14 +0000 (10:01 +0100)
committerWolfgang Bumiller <w.bumiller@proxmox.com>
Thu, 3 Mar 2016 09:01:14 +0000 (10:01 +0100)
This way the $BROWSER environment variable is used instead
if it exists.


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