config.mak.uname: update settings for OpenBSD

OpenBSD requires DIR_HAS_BSD_GROUP_SEMANTICS.

OpenBSD has never had the BSD sysctl KERN_PROC_PATHNAME nor
does it support or use the /proc filesystem.

OpenBSD has had strcasestr() since 3.8. OpenBSD has had memmem()
since 5.4.

Signed-off-by: Brad Smith <brad@comstyle.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Author: brad0

config.mak.uname

@@ -294,17 +294,14 @@ ifeq ($(uname_S),FreeBSD)
 	FILENO_IS_A_MACRO = UnfortunatelyYes
 endif
 ifeq ($(uname_S),OpenBSD)
-	NO_STRCASESTR = YesPlease
-	NO_MEMMEM = YesPlease
+	DIR_HAS_BSD_GROUP_SEMANTICS = YesPlease
 	USE_ST_TIMESPEC = YesPlease
 	NEEDS_LIBICONV = YesPlease
 	BASIC_CFLAGS += -I/usr/local/include
 	BASIC_LDFLAGS += -L/usr/local/lib
 	HAVE_PATHS_H = YesPlease
 	HAVE_BSD_SYSCTL = YesPlease
-	HAVE_BSD_KERN_PROC_SYSCTL = YesPlease
 	CSPRNG_METHOD = arc4random
-	PROCFS_EXECUTABLE_PATH = /proc/curproc/file
 	FREAD_READS_DIRECTORIES = UnfortunatelyYes
 	FILENO_IS_A_MACRO = UnfortunatelyYes
 endif