Use htmlroff in doc mkfiles.
 [rsc] --rw-rw-r-- M 1428987 glenda sys 214 Jan 28 09:41 sys/doc/8½/mkfile
	/n/sourcesdump/2006/0128/plan9/sys/doc/8½/mkfile:4,8 - 
	/n/sourcesdump/2006/0129/plan9/sys/doc/8½/mkfile:4,9
	  	{echo $FONTS; cat 8½.ms} | tbl | troff -ms -mpictures -mnihongo | lp -dstdout >8½.ps
	  	../cleanps 8½.ps
	  
	- 8½.html:D:
	- 	{echo $FONTS; cat 8½.ms} | tbl | ms2html >8½.html
	+ 8½.html:D: 8½.ms
	+ 	tbl 8½.ms | htmlroff -ms -mhtml >8½.html
	+ 
 [rsc] --rw-rw-r-- M 1428987 glenda sys 295 Jan 28 09:41 sys/doc/acme/mkfile
	/n/sourcesdump/2006/0128/plan9/sys/doc/acme/mkfile:8,12 - 
	/n/sourcesdump/2006/0129/plan9/sys/doc/acme/mkfile:8,12
	  	../cleanps acme.ps
	  
	  acme.html:D:	acme.ms
	- 	{echo $FONTS; cat acme.ms} | ms2html >acme.html
	+ 	htmlroff -ms -mhtml acme.ms >acme.html
	  
 [rsc] --rw-rw-r-- M 1428987 glenda sys 273 Jan 28 09:41 sys/doc/fs/mkfile
	/n/sourcesdump/2006/0128/plan9/sys/doc/fs/mkfile:18,21 - 
	/n/sourcesdump/2006/0129/plan9/sys/doc/fs/mkfile:18,22
	  	{echo $FONTS; cat $OBJ } | troff -ms >fs.trout
	  
	  fs.html:D:
	- 	{echo $FONTS; cat $OBJ } | ms2html >fs.html
	+ 	htmlroff -ms -mhtml $OBJ >fs.html
	+ 
 [rsc] --rw-rw-r-- M 1428987 glenda sys 206 Jan 28 09:41 sys/doc/il/mkfile
	/n/sourcesdump/2006/0128/plan9/sys/doc/il/mkfile:5,8 - 
	/n/sourcesdump/2006/0129/plan9/sys/doc/il/mkfile:5,9
	  	../cleanps il.ps
	  
	  il.html:D:	il.ms transition.pic
	- 	{echo $FONTS; cat il.ms} | pic | ms2html >il.html
	+ 	pic il.ms | htmlroff -ms -mhtml >il.html
	+ 
 [rsc] --rw-rw-r-- M 1428987 glenda sys 334 Jan 28 09:41 sys/doc/net/mkfile
	/n/sourcesdump/2006/0128/plan9/sys/doc/net/mkfile:14,17 - 
	/n/sourcesdump/2006/0129/plan9/sys/doc/net/mkfile:14,18
	  	pic tree > tree.pout
	  
	  net.html:D:	$DEPS
	- 	{ echo $FONTS; cat net.ms } | tbl | ms2html > net.html
	+ 	tbl net.ms | htmlroff -ms -mhtml >net.html
	+ 
 [rsc] --rw-rw-r-- M 1428987 glenda sys 566 Jan 28 09:41 sys/doc/sam/mkfile
	/n/sourcesdump/2006/0128/plan9/sys/doc/sam/mkfile:11,14 - 
	/n/sourcesdump/2006/0129/plan9/sys/doc/sam/mkfile:11,15
	  	troff -ms sam.tut > sam.tut.out
	  
	  sam.html:D:	sam.ms fig1.ps fig2.ps fig3.ps fig4.ps fig5.pic fig6.pic fig7.pic refs
	- 	{echo $FONTS; cat sam.ms refs} | pic | tbl | ms2html >sam.html
	+ 	pic sam.ms refs | tbl | htmlroff -ms -mhtml >sam.html
	+