If DEVELOPER=yes is defined, it defines extra CFLAGS which
affect the build (breaks it on 10-stable at least due to const
arg mismatch for basename(3)).  This patch clears those
extra CFLAGS.

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=214009

Index: Makefile
===================================================================
--- Makefile	(revision 427492)
+++ Makefile	(working copy)
@@ -27,6 +27,7 @@
 USES=		gmake shebangfix ssl tar:xz
 CPPFLAGS+=	-isystem${LOCALBASE}/include
 LDFLAGS+=	-L${LOCALBASE}/lib
+MAKE_ARGS+=	DEVELOPER_CFLAGS=
 MAKE_ENV+=	V=1
 USE_RC_SUBR=	git_daemon
 SHEBANG_FILES=	*.perl */*.perl */*/*.perl */*.pl */*/*.pl */*/*/*.pl \