hugo server: Fix bind and hostname parameters

When BIND variable is defined, baseURL/.HOST should not be set to
localhost by default.

Reported by:	imp
Reviewed by:	imp, ceri, blackend
Differential Revision: https://reviews.freebsd.org/D30656

documentation/Makefile

@@ -39,9 +39,13 @@ RUN_DEPENDS=	${PYTHON_CMD} \
 		${LOCALBASE}/bin/rougify
 
 .ifndef HOSTNAME
-.HOST+=localhost
+.  ifdef BIND
+.HOST=$(BIND)
+.  else
+.HOST=localhost
+.  endif
 .else
-.HOST+=$(HOSTNAME)
+.HOST=$(HOSTNAME)
 .endif
 
 .ORDER: all run

website/Makefile

@@ -22,9 +22,13 @@ RUBYLIB =	../shared/lib
 .export	RUBYLIB
 
 .ifndef HOSTNAME
-.HOST+=localhost
+.  ifdef BIND
+.HOST=$(BIND)
+.  else
+.HOST=localhost
+.  endif
 .else
-.HOST+=$(HOSTNAME)
+.HOST=$(HOSTNAME)
 .endif
 
 .ORDER: all run