patch 7.4.1436

Problem:    Sniff files still referenced in distribution.
Solution:   Remove sniff files from distribution.

Filelist

@@ -262,7 +262,6 @@ SRC_DOS_UNIX =	\
 		src/if_python3.c \
 		src/if_py_both.h \
 		src/if_ruby.c \
-		src/if_sniff.h \
 		src/if_tcl.c \
 		src/proto/if_cscope.pro \
 		src/proto/if_lua.pro \
@@ -455,7 +454,6 @@ SRC_EXTRA =	\
 		$(SRC_VMS) \
 		README_os390.txt \
 		src/Make_mint.mak \
-		src/if_sniff.c \
 		src/infplist.xml \
 		src/link.390 \
 		src/os_beos.c \