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)
........

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


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/13@429675 65c4cc65-6c06-0410-ace0-fbb531ad65f3

main/http.c

@@ -1030,8 +1030,8 @@ static int http_body_check_chunk_sync(struct ast_tcptls_session_instance *ser)
 		return -1;
 	}
 	if (chunk_sync[0] != 0x0D || chunk_sync[1] != 0x0A) {
-		ast_log(LOG_WARNING, "HTTP chunk sync bytes wrong (0x%02X, 0x%02X)\n",
-			(unsigned) chunk_sync[0], (unsigned) chunk_sync[1]);
+		ast_log(LOG_WARNING, "HTTP chunk sync bytes wrong (0x%02hhX, 0x%02hhX)\n",
+			(unsigned char) chunk_sync[0], (unsigned char) chunk_sync[1]);
 		return -1;
 	}