Help deleting header name that contains curly braces

I think I just figured it out guys Mohamed_Ahmed_Kansoh  CA_Valli 

Paste this and run it.  It worked out for me.  Now any of you can explain why this works??  Is this a bug with F5?  At least it seems to me.  If it is, how can I let them know so they can fix it.

when HTTP_REQUEST {
  if { [HTTP::uri] eq "/demo2" } {
    HTTP::header insert "{esbsoapheader}userName" "spencer"
    foreach aHeader [HTTP::header names] {
      log local0. "HTTP Request Headers: $aHeader: [HTTP::header value $aHeader]"
    }
    log local0. "***************REMOVING BAD HEADER************"
    HTTP::header remove "\\{esbsoapheader\\}userName"
    foreach aHeader [HTTP::header names] {
      log local0. "HTTP Request Headers: $aHeader: [HTTP::header value $aHeader]"
    }
  }
}