For EXT*DIR, use -H in addition to -R, so that a symlink may be used in the EXTSRCDIR case, for example, if one finds it useful to symlink /usr/src to an actual source tree, and use /usr/src as the EXTSRCDIR.
For EXT*DIR, use -H in addition to -R, so that a symlink may be
used in the EXTSRCDIR case, for example, if one finds it useful
to symlink /usr/src to an actual source tree, and use /usr/src
as the EXTSRCDIR.

This has no effects on release builds not using external directories.

Reviewed by:	ru
Approved by:	scottl (re)

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