hx509: Fix sel-gram.y shift/reduce conflicts

AND and OR are now binary operators, left-associative, with AND having
higher precedence than OR.

The not operator is now higher-precedence than the AND and OR operators.

lib/hx509/Makefile.am

@@ -11,7 +11,7 @@ BUILT_SOURCES =				\
 	hx509_err.c			\
 	hx509_err.h
 
-AM_YFLAGS = -d
+AM_YFLAGS = -o sel-gram.c
 
 dist_libhx509_la_SOURCES = \
 	ca.c \

lib/hx509/sel-gram.y

@@ -78,6 +78,10 @@
 %token <string> STRING
 %token <string> IDENTIFIER
 
+%precedence '!'
+%left kw_AND
+%left kw_OR
+
 %start start
 
 %%