K 10
svn:author
V 8
bdrewery
K 8
svn:date
V 27
2015-03-29T19:45:39.764617Z
K 7
svn:log
V 456
Fix duplicate values in ENV vars and X_BUILD_FOR truncating BUILD_DEPENDS.

PKG_NOTES/PKG_ENV/CONFIGURE_ENV/MAKE_ENV/CO_ENV/QA_ENV were using += before the
double include check so any port using bsd.port.options.mk or bsd.port.pre.mk
would have duplicated items in these vars.

All ports would have their BUILD_DEPENDS truncated with X_BUILD_FOR.

PR:		198803 (exp run by antoine)
Differential Revision:	https://reviews.freebsd.org/D2113
With hat:	portmgr

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