	In non-mono build dir:
grep -B 1 "^Width: 0$" out-unifont-all.sfd >..\..\w0-B1

	In mono, merged:
D:\Programs\fontforge-cygwin_2016_05_26\fontforge-do.bat -lang=ff -c "Open($1); Save($1 + '-o.sfd');" merged-unifont-mono.ttf

grep "^Encoding: " K:\get\dejavu-fonts-2.36\src\DejaVuSansMono.sfd >..\..\Deja-cov

	In ../..
perl -wlne "BEGIN {$rx = qr/^Encoding:\s+-?\d+\s+((-)?\d+)\s+/; open $f, q(<), shift or die; for (<$f>) {next if /UnicodeFull/; /$rx/ or die; next if $2; $seen{$1}++}} next if /Width|--/; /$rx/ or die; next if $2; print $1 unless $seen{$1} " Deja-cov w0-B1  >w0-non-Deja

	    pos \uni0343 <0 0 -1233 0>;
perl -wlne "$o = sprintf +($_>0xffff? qq(u\x2506X) : qq(uni\x2504X)), $_; print qq(    pos \\$o <0 0 -1233 0>;)" ../../w0-non-Deja >add-fea

D:\Programs\fontforge-cygwin_2016_05_26\fontforge-do.bat -lang=ff -c "Open($1); GenerateFeatureFile($1 + '-features');" merged-unifont-mono.ttf
perl -0777wpe "BEGIN{open my $f, q(<), shift or die; $in = <$f>} s/^(\s+pos\s+\\uni03[\dA-F]{2}\s.*\n)(?=\s*\})/$1$in/m" add-fea merged-unifont-mono.ttf-features >merged-unifont-mono-add.fea


---- Mismatch in counts:
perl -wlne "/^StartChar:\s*(uni|u0)(.*)/ or next; print $2" out-unifont-mono.sfd >out-unifont-mono.cov
ttfdump -t cmap merged-unifont-mono.ttf | perl -wlne "/^\s*Group/ or next; /^\s*Group\s+\d+\s*:\s*startCharCode\s*=\s*(\d+),\s*endCharCode\s*=\s*(\d+),/ or die $_; print sprintf qq(\x2504X), $_ for $1..$2" >>merged-unifont-mono-merged.cov
