diff -up cyrus-imapd-2.4.12/imap/global.c.debugopt cyrus-imapd-2.4.12/imap/global.c

--- cyrus-imapd-2.4.12/imap/global.c.debugopt	2011-10-04 21:53:03.000000000 +0200

+++ cyrus-imapd-2.4.12/imap/global.c	2011-11-22 14:24:28.272416643 +0100

@@ -157,6 +157,10 @@ int cyrus_init(const char *alt_config, c

 	/* don't free the openlog() string! */

     }

+    /* allow debug logging */

+    if (!config_debug)

+	setlogmask(~LOG_MASK(LOG_DEBUG));

+

     /* Look up default partition */

     config_defpartition = config_getstring(IMAPOPT_DEFAULTPARTITION);

     for (p = (char *)config_defpartition; p && *p; p++) {

diff -up cyrus-imapd-2.4.12/imap/tls.c.debugopt cyrus-imapd-2.4.12/imap/tls.c

--- cyrus-imapd-2.4.12/imap/tls.c.debugopt	2011-10-04 21:53:03.000000000 +0200

+++ cyrus-imapd-2.4.12/imap/tls.c	2011-11-22 14:24:28.272416643 +0100

@@ -255,9 +255,9 @@ static DH *load_dh_param(const char *key

     if (ret == NULL) {

 	ret = get_dh1024();

-	syslog(LOG_NOTICE, "imapd:Loading hard-coded DH parameters");

+	syslog(LOG_DEBUG, "imapd:Loading hard-coded DH parameters");

     } else {

-	syslog(LOG_NOTICE, "imapd:Loading DH parameters from file");

+	syslog(LOG_DEBUG, "imapd:Loading DH parameters from file");

     }

     if (bio != NULL) BIO_free(bio);

diff -up cyrus-imapd-2.4.12/lib/imapoptions.debugopt cyrus-imapd-2.4.12/lib/imapoptions

--- cyrus-imapd-2.4.12/lib/imapoptions.debugopt	2011-11-22 14:24:28.265416615 +0100

+++ cyrus-imapd-2.4.12/lib/imapoptions	2011-11-22 14:24:28.273416647 +0100

@@ -388,6 +388,9 @@ Blank lines and lines beginning with ``#

    hashing done on configuration directories.  This is recommended if

    one partition has a very bushy mailbox tree. */

+{ "debug", 0, SWITCH }

+/* If enabled, allow syslog() to pass LOG_DEBUG messages. */

+

 # Commented out - there's no such thing as "hostname_mechs", but we need

 # this for the man page

 # { "hostname_mechs", NULL, STRING }

diff -up cyrus-imapd-2.4.12/lib/libconfig.c.debugopt cyrus-imapd-2.4.12/lib/libconfig.c

--- cyrus-imapd-2.4.12/lib/libconfig.c.debugopt	2011-10-04 21:53:03.000000000 +0200

+++ cyrus-imapd-2.4.12/lib/libconfig.c	2011-11-22 14:24:28.274416650 +0100

@@ -84,6 +84,7 @@ int config_auditlog;

 unsigned config_maxword;

 unsigned config_maxquoted;

 int config_qosmarking;

+int config_debug;

 /* declared in each binary that uses libconfig */

 extern const int config_need_data;

@@ -350,6 +351,9 @@ void config_read(const char *alt_config)

     ival = config_getenum(IMAPOPT_QOSMARKING);

     config_qosmarking = qos[ival];

+

+    /* allow debug logging */

+    config_debug = config_getswitch(IMAPOPT_DEBUG);

 }

 #define GROWSIZE 4096

diff -up cyrus-imapd-2.4.12/lib/libconfig.h.debugopt cyrus-imapd-2.4.12/lib/libconfig.h

--- cyrus-imapd-2.4.12/lib/libconfig.h.debugopt	2011-10-04 21:53:03.000000000 +0200

+++ cyrus-imapd-2.4.12/lib/libconfig.h	2011-11-22 14:24:28.274416650 +0100

@@ -82,6 +82,7 @@ extern int config_auditlog;

 extern unsigned config_maxquoted;

 extern unsigned config_maxword;

 extern int config_qosmarking;

+extern int config_debug;

 /* config requirement flags */

 #define CONFIG_NEED_PARTITION_DATA (1<<0)

diff -up cyrus-imapd-2.4.12/master/master.c.debugopt cyrus-imapd-2.4.12/master/master.c

--- cyrus-imapd-2.4.12/master/master.c.debugopt	2011-10-04 21:53:03.000000000 +0200

+++ cyrus-imapd-2.4.12/master/master.c	2011-11-22 14:30:47.243975974 +0100

@@ -1984,7 +1984,7 @@ int main(int argc, char **argv)

 	if(pidlock_fd != -1) close(pidlock_fd);

     }

-    syslog(LOG_NOTICE, "process started");

+    syslog(LOG_DEBUG, "process started");

 #if defined(HAVE_UCDSNMP) || defined(HAVE_NETSNMP)

     /* initialize SNMP agent */

@@ -2041,7 +2041,7 @@ int main(int argc, char **argv)

     init_janitor();

     /* ok, we're going to start spawning like mad now */

-    syslog(LOG_NOTICE, "ready for work");

+    syslog(LOG_DEBUG, "ready for work");

     now = time(NULL);

     for (;;) {

diff -up cyrus-imapd-2.4.12/master/masterconf.c.debugopt cyrus-imapd-2.4.12/master/masterconf.c

--- cyrus-imapd-2.4.12/master/masterconf.c.debugopt	2011-10-04 21:53:03.000000000 +0200

+++ cyrus-imapd-2.4.12/master/masterconf.c	2011-11-22 14:24:28.276416658 +0100

@@ -99,6 +99,10 @@ int masterconf_init(const char *ident, c

         /* don't free the openlog() string! */

     }

+    /* drop debug messages locally */

+    if (!config_debug)

+	setlogmask(~LOG_MASK(LOG_DEBUG));

+

     return 0;

 }