ruleproc: add gromox.cfg:ruleproc_debug config directive

Author: jengelh

doc/gromox.cfg.5

@@ -54,6 +54,18 @@ cannot be lower than 4s. The special value 0 disabled RPC timeout checking.
 .br
 Default: \fI0\fP
 .TP
+\fBruleproc_debug\fP
+Make the "TWOSTEP" Client-Side Inbox Rule Processor emit information about the
+conditions it is evaluating and the actions it is carrying out. The surrounding
+process also needs to have log level set to at least 6 (debug) to see anything,
+i.e. delivery.cfg:lda_log_level=6 in case of delivery(8gx), or \-\-loglevel=6
+in case of command-line tools like case of gromox\-mt2exm(8). [The Rule
+Processor implementation inside exmdb_provider(8gx) logs unconditionally, and
+its log messages will be seen, provided level 6 is set with
+http.cfg:http_log_level=6.]
+.br
+Default: \fIoff\fP
+.TP
 \fBreported_server_version\fP
 .br
 Default: \fI15.00.0847.4040\fP

include/gromox/exmdb_rpc.hpp

@@ -1392,4 +1392,3 @@ extern GX_EXPORT BOOL exmdb_client_write_socket(int, std::string_view, long time
 
 extern GX_EXPORT void *(*exmdb_rpc_alloc)(size_t);
 extern GX_EXPORT void (*exmdb_rpc_free)(void *);
-extern GX_EXPORT unsigned int g_ruleproc_debug;

lib/ruleproc.cpp

@@ -1364,6 +1364,7 @@ static ec_error_t exmdb_local_rules_execute(const char *dir, const char *ev_from
 }
 
 static constexpr cfg_directive rp_config_defaults[] = {
+	{"ruleproc_debug", "0", CFG_BOOL},
 	{"outgoing_smtp_url", "sendmail://localhost"},
 	CFG_TABLE_END,
 };