Import mandoc cvs snapshot 20170121 (pre 1.14)

Note that mandoc does not use anymore sqlite3 but a home made database format
An important improvement has been made as well in makewhatis performance:
Tests on my laptop shows makewhatis on the entire system goes from 26s to 12s

2 files changed, 16 insertions, 13 deletions

diff --git a/usr.bin/mandoc/Makefile b/usr.bin/mandoc/Makefile
index 9e397cf31910..dfc58385f85d 100644
--- a/usr.bin/mandoc/Makefile
+++ b/usr.bin/mandoc/Makefile
@@ -65,26 +65,31 @@ TERM_SRCS=	eqn_term.c \
 		term_ps.c \
 		tbl_term.c
 
-DB_SRCS=	mandocdb.c \
-		mansearch.c \
-		mansearch_const.c \
-		tag.c \
-		manpath.c
+DBM_SRCS=	dbm.c \
+		dbm_map.c \
+		mansearch.c
+
+DBA_SRCS=	dba.c \
+		dba_array.c \
+		dba_read.c \
+		dba_write.c \
+		mandocdb.c
 
 SRCS=		${LIB_SRCS} \
 		${HTML_SRCS} \
 		${MAN_SRCS} \
 		${TERM_SRCS} \
+		${DBM_SRCS} \
+		${DBA_SRCS} \
 		main.c \
+		manpath.c \
 		out.c \
+		tag.c \
 		tree.c
 
-SRCS+=	${DB_SRCS}
-
-WARNS?=	2
+WARNS?=	3
 CFLAGS+= -DHAVE_CONFIG_H \
-	 -I${.CURDIR}/../../lib/libopenbsd/ \
-	 -I${.CURDIR}/../../contrib/sqlite3
-LIBADD=	openbsd sqlite3 z
+	 -I${.CURDIR}/../../lib/libopenbsd/
+LIBADD=	openbsd z
 
 .include <bsd.prog.mk>
diff --git a/usr.bin/mandoc/Makefile.depend b/usr.bin/mandoc/Makefile.depend
index 7c705f5b3c99..1fe4610a2f03 100644
--- a/usr.bin/mandoc/Makefile.depend
+++ b/usr.bin/mandoc/Makefile.depend
@@ -10,8 +10,6 @@ DIRDEPS = \
 	lib/libc \
 	lib/libcompiler_rt \
 	lib/libopenbsd \
-	lib/libsqlite3 \
-	lib/libthr \
 	lib/libz \