Fix printf problems with high ascii characters after r413586 (1.8).

In r413586 (1.8) various casts were added to silence gcc 4.10 warnings.
Those fixes included things like:

    -out += sprintf(out, "%%%02X", (unsigned char) *ptr);
    +out += sprintf(out, "%%%02X", (unsigned) *ptr);

That works for low ascii characters, but for the high range that yields
e.g. FFFFFFC3 when C3 is expected.

This changeset:
- fixes those casts to use the 'hh' unsigned char modifier instead
- consistently uses %02x instead of %2.2x (or other non-standard usage)
- adds a few 'h' modifiers in various places
- fixes a 'replcaes' typo
- dev/urandon typo (in 13+ patch)

Review: https://reviewboard.asterisk.org/r/4263/

ASTERISK-24619 #close
Reported by: Stefan27 (on IRC)
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Merged revisions 429673 from http://svn.asterisk.org/svn/asterisk/branches/11
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Merged revisions 429674 from http://svn.asterisk.org/svn/asterisk/branches/12
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Merged revisions 429675 from http://svn.asterisk.org/svn/asterisk/branches/13


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@429683 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/iax2/parser.c

@@ -111,7 +111,7 @@ static void dump_string_hex(char *output, int maxlen, void *value, int len)
 	int i = 0;
 
 	while (len-- && (i + 1) * 4 < maxlen) {
-		sprintf(output + (4 * i), "\\x%2.2x", (unsigned)*((unsigned char *)value + i));
+		sprintf(output + (4 * i), "\\x%02hhx", *((unsigned char *)value + i));
 		i++;
 	}
 }