silence compiler warnings for RHEL 9 Linux

We updated ${CSILENCE} Makefile variables for entries in an attempt to
minimize compiler warnings.  This was tested using
gcc version 11.4.1 20230605 (Red Hat 11.4.1-2) (GCC).

TODO: Recheck macOS clang to see if any new warnings have occur
      under macOS clang.

1985/sicherman/Makefile

@@ -39,10 +39,10 @@ include ../../var.mk
 # Common C compiler warnings to silence
 #
 CSILENCE= -Wno-comment -Wno-deprecated-non-prototype -Wno-main -Wno-pedantic \
-	-Wno-return-type -Wno-strict-prototypes -Wno-unused-parameter -Wno-implicit-int \
-	-Wno-implicit-function-declaration -Wno-unused-value -Wno-multichar \
-	-Wno-uninitialized -Wno-unused-but-set-parameter -Wno-parentheses \
-	-Wno-int-conversion
+	  -Wno-return-type -Wno-strict-prototypes -Wno-unused-parameter \
+	  -Wno-implicit-int -Wno-implicit-function-declaration -Wno-unused-value \
+	  -Wno-multichar -Wno-uninitialized -Wno-unused-but-set-parameter \
+	  -Wno-parentheses -Wno-int-conversion -Wno-missing-parameter-type
 
 # Common C compiler warning flags
 #
@@ -88,7 +88,9 @@ CC= cc
 ifeq "$(findstring $(CLANG),${CC})" "$(CLANG)"
 #
 CSILENCE+= -Wno-poison-system-directories -Wno-comma -Wno-missing-prototypes \
-	-Wno-unused-macros -Wno-missing-variable-declarations -Wno-shadow
+	   -Wno-unused-macros -Wno-missing-variable-declarations -Wno-shadow \
+	   -Wno-reserved-identifier -Wno-reserved-macro-identifier \
+	   -Wno-unknown-warning-option
 #
 CWARN+= -Weverything
 #