K 10
svn:author
V 8
bdrewery
K 8
svn:date
V 27
2017-06-21T23:01:18.053583Z
K 7
svn:log
V 479
Follow-up r308602: Don't add missing headers to .depend.tables.h.

This also avoids an error from egrep when a header is missing.  This can happen
with something like WITHOUT_BLUETOOTH set when searching for
$include_dir/netgraph/bluetooth/include/ng_btsocket.h.  The warning was
not an error (from set -e) due to being on the left side of a pipe.  Now the
all_headers list is only filled with existing headers.

Reviewed by:	ngie
MFC after:	3 days
Sponsored by:	Dell EMC Isilon

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