rust: fix warnings about wrong type of comments

"rustdoc does not generate documentation for macro expansions"

rust/src/dhcp/parser.rs

@@ -169,8 +169,8 @@ named!(pub parse_generic_option<DHCPOption>,
            ))
 );
 
-/// Parse a single DHCP option. When option 255 (END) is parsed, the remaining
-/// data will be consumed.
+// Parse a single DHCP option. When option 255 (END) is parsed, the remaining
+// data will be consumed.
 named!(pub parse_option<DHCPOption>,
        switch!(peek!(be_u8),
                // End of options case. We consume the rest of the data
@@ -190,8 +190,8 @@ named!(pub parse_option<DHCPOption>,
                _ => call!(parse_generic_option)
        ));
 
-/// Parse and return all the options. Upon the end of option indicator
-/// all the data will be consumed.
+// Parse and return all the options. Upon the end of option indicator
+// all the data will be consumed.
 named!(pub parse_all_options<Vec<DHCPOption>>, many0!(complete!(call!(parse_option))));
 
 pub fn dhcp_parse(input: &[u8]) -> IResult<&[u8], DHCPMessage> {

rust/src/dns/parser.rs

@@ -21,7 +21,7 @@ use nom::{IResult, be_u8, be_u16, be_u32};
 use nom;
 use dns::dns::*;
 
-/// Parse a DNS header.
+// Parse a DNS header.
 named!(pub dns_parse_header<DNSHeader>,
        do_parse!(
            tx_id: be_u16 >>

rust/src/smb/smb_records.rs

@@ -45,7 +45,7 @@ pub fn smb_get_unicode_string(blob: &[u8]) -> IResult<&[u8], Vec<u8>>
     Err(nom::Err::Error(error_position!(blob,ErrorKind::Custom(130))))
 }
 
-/// parse an ASCII string that is null terminated
+// parse an ASCII string that is null terminated
 named!(pub smb_get_ascii_string<Vec<u8>>,
     do_parse!(
             s: take_until_and_consume!("\x00")