Const-ify the world (or at least a good part of it)

This patch adds 'const' tags to a number of Asterisk APIs where they are appropriate (where the API already demanded that the function argument not be modified, but the compiler was not informed of that fact). The list includes:

- CLI command handlers
- CLI command handler arguments
- AGI command handlers
- AGI command handler arguments
- Dialplan application handler arguments
- Speech engine API function arguments

In addition, various file-scope and function-scope constant arrays got 'const' and/or 'static' qualifiers where they were missing.

Review: https://reviewboard.asterisk.org/r/251/



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@196072 65c4cc65-6c06-0410-ace0-fbb531ad65f3

main/frame.c

@@ -1354,7 +1354,7 @@ static unsigned char get_n_bits_at(unsigned char *data, int n, int bit)
 
 static int speex_get_wb_sz_at(unsigned char *data, int len, int bit)
 {
-	static int SpeexWBSubModeSz[] = {
+	static const int SpeexWBSubModeSz[] = {
 		0, 36, 112, 192,
 		352, 0, 0, 0 };
 	int off = bit;
@@ -1384,12 +1384,12 @@ static int speex_get_wb_sz_at(unsigned char *data, int len, int bit)
 
 static int speex_samples(unsigned char *data, int len)
 {
-	static int SpeexSubModeSz[] = {
+	static const int SpeexSubModeSz[] = {
 		5, 43, 119, 160,
 		220, 300, 364, 492, 
 		79, 0, 0, 0,
 		0, 0, 0, 0 };
-	static int SpeexInBandSz[] = { 
+	static const int SpeexInBandSz[] = { 
 		1, 1, 4, 4,
 		4, 4, 4, 4,
 		8, 8, 16, 16,