Address review comments

- update typo
- document new parameter

daemon/main.c

@@ -478,7 +478,7 @@ static void options(int *argc, char ***argv) {
 		{ "jb-clock-drift",0,0,	G_OPTION_ARG_NONE,	&rtpe_config.jb_clock_drift,"Compensate for source clock drift",NULL },
 		{ "debug-srtp",0,0,	G_OPTION_ARG_NONE,	&debug_srtp,		"Log raw encryption details for SRTP",	NULL },
 		{ "dtls-rsa-key-size",0, 0,	G_OPTION_ARG_INT,&rtpe_config.dtls_rsa_key_size,"Size of RSA key for DTLS",	"INT"		},
-		{ "dtls-mtu",0, 0,	G_OPTION_ARG_INT,&rtpe_config.dtls_mtu,"DTLS MTU)",	"INT"		},
+		{ "dtls-mtu",0, 0,	G_OPTION_ARG_INT,&rtpe_config.dtls_mtu,"DTLS MTU",	"INT"		},
 		{ "dtls-ciphers",0,  0,	G_OPTION_ARG_STRING,	&rtpe_config.dtls_ciphers,"List of ciphers for DTLS",		"STRING"	},
 		{ "dtls-signature",0,  0,G_OPTION_ARG_STRING,	&dtls_sig,		"Signature algorithm for DTLS",		"SHA-256|SHA-1"	},
 		{ "listen-http", 0,0,	G_OPTION_ARG_STRING_ARRAY,&rtpe_config.http_ifs,"Interface for HTTP and WS",	"[IP46|HOSTNAME:]PORT"},

daemon/rtpengine.pod

@@ -878,6 +878,14 @@ guaranteed that only a single thread will ever read from a particular socket,
 thus maintaining the order of the packets. Might help when having issues with
 DTMF packets (RFC 2833).
 
+=item B<--dtls-mtu>
+
+Set DTLS MTU to enable fragmenting of large DTLS packets. Defaults to 1200.
+Minimum value is 576 as the internet protocol requires that hosts must be able to 
+process IP datagrams of at least 576 bytes (for IPv4) or 1280 bytes (for IPv6).
+This does not preclude link layers with an MTU smaller than this minimum MTU from 
+conveying IP data. Internet IPv4 path MTU is 68 bytes.
+
 =back
 
 =head1 INTERFACES