Don't allow picking up collectdclient, freeradius autoconf's smart
library detection doesn't offer a nice way to do it.

Prefer pcre2 rather than pcre. Likewise re smart library detection.

Index: configure
--- configure.orig
+++ configure
@@ -8506,7 +8506,7 @@ if test "x$smart_lib" != "x"; then
   SMART_LIBS="$smart_ldflags $smart_lib $SMART_LIBS"
 fi
 
-if test "x$ac_cv_lib_collectdclient_lcc_connect" != "xyes"; then
+if true || test "x$ac_cv_lib_collectdclient_lcc_connect" != "xyes"; then
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: collectdclient library not found. Use --with-collectdclient-lib-dir=<path>." >&5
 printf "%s\n" "$as_me: WARNING: collectdclient library not found. Use --with-collectdclient-lib-dir=<path>." >&2;}
 else
@@ -13560,7 +13560,7 @@ then :
 
 fi
 
-if test "x$REGEX" != "xno" && test "x$PCRE" != "xno"; then
+if false && test "x$REGEX" != "xno" && test "x$PCRE" != "xno"; then
   smart_try_dir=$pcre_include_dir
 
 
