all: DragonFly port.

Fix compilation problems, libdraw still doesn't work right yet.

LGTM=rsc
R=rsc
https://codereview.appspot.com/67820046

src/cmd/9660srv/main.c

@@ -2,6 +2,7 @@
 #include <libc.h>
 #include <auth.h>
 #include <fcall.h>
+#include <errno.h>
 #include "dat.h"
 #include "fns.h"
 
@@ -38,7 +39,6 @@ Fcall *rep;
 uchar mdata[Maxiosize];
 char fdata[Maxfdata];
 uchar statbuf[STATMAX];
-int errno;
 
 
 extern Xfsub	*xsublist[];

src/cmd/9term/DragonFly.c

@@ -0,0 +1 @@
+#include "bsdpty.c"

src/cmd/9term/mkfile

@@ -10,7 +10,7 @@ HFILES=dat.h fns.h term.h
 
 <$PLAN9/src/mkmany
 
-Darwin.$O Linux.$O FreeBSD.$O: bsdpty.c
+Darwin.$O Linux.$O FreeBSD.$O DragonFly.$O: bsdpty.c
 
 $O.9term: data.$O scrl.$O time.$O util.$O wind.$O
 

src/cmd/auxstats/DragonFly.c

@@ -0,0 +1,10 @@
+#include <u.h>
+#include <libc.h>
+#include <bio.h>
+#include "dat.h"
+
+void (*statfn[])(int) = 
+{
+	0
+};
+

src/cmd/eqn/lex.c

@@ -1,6 +1,7 @@
 #include "e.h"
 #include "y.tab.h"
 #include <ctype.h>
+#include <errno.h>
 
 #define	SSIZE	1000
 char	token[SSIZE];
@@ -19,7 +20,7 @@ yylex(void)
 	register int c;
 	tbl *tp;
 
-  begin:
+begin:
 	while ((c = input()) == ' ' || c == '\n' || c == '\t')
 		;
 	yylval = c;
@@ -236,7 +237,6 @@ void include(void)
 	char name[100];
 	FILE *fin;
 	int c;
-	extern int errno;
 
 	while ((c = input()) == ' ')
 		;
@@ -260,7 +260,7 @@ void delim(void)
 		ERROR "Bizarre delimiters" FATAL;
 	lefteq = token[0];
 	righteq = token[1];
-        if (!isprint(lefteq) || !isprint(righteq))
+	if (!isprint(lefteq) || !isprint(righteq))
 		ERROR "Bizarre delimiters" FATAL;
 	if (lefteq == 'o' && righteq == 'f')
 		lefteq = righteq = '\0';

src/cmd/tpic/input.c

@@ -428,8 +428,6 @@ pbstr(char *s)
 double
 errcheck(double x, char *s)
 {
-	extern int errno;
-
 	if (errno == EDOM) {
 		errno = 0;
 		ERROR "%s argument out of domain", s WARNING;

src/cmd/vbackup/mount-DragonFly.c

@@ -0,0 +1 @@
+#include "mount-BSD.c"