Suricata

Using rustc 1.37.0-nightly (0beb2ba16 2019-07-02) for compiling suricata, I got two new warnings

warning: `...` range patterns are deprecated
   --> src/smb/dcerpc.rs:364:19
    |
364 |                 21...255 => {
    |                   ^^^ help: use `..=` for an inclusive range
    |
    = note: #[warn(ellipsis_inclusive_range_patterns)] on by default

warning: `...` range patterns are deprecated
   --> src/smb/dcerpc.rs:482:11
    |
482 |         21...255 => {
    |           ^^^ help: use `..=` for an inclusive range

warning: variable does not need to be mutable
   --> src/dhcp/parser.rs:202:17
    |
202 |             let mut malformed_options = false;
    |                 ----^^^^^^^^^^^^^^^^^
    |                 |
    |                 help: remove this `mut`
    |
    = note: #[warn(unused_mut)] on by default

Fix must work with the minimal rustc version (1.24) supported by Suricata