### Description

I have the following URI: ```INVITE sip:123456789;phone-context=+1@192.168.1.1;transport=udp;user=phone SIP/2.0```

I want to remove the phone-context parameter from the URI, so I've tried to use the function: ```uri_param_rm``` from the siputils package:

``` if (uri_param_rm("phone-context")) { t_relay_to_udp("192.168.1.2", "5060"); exit; } ```

But this doesn't change anything, this parameter is still present in the URI.

I tried to use ```msg_apply_changes``` (just in case) function before relaying it - the result it the same, the parameter is still there.

Also, I've noticed that this function is not working either:

``` if (uri_param_any("phone-context")) { xlog("L_INFO", "Phone Context"); } ```

while this one: ```get_uri_param("phone-context", "$var(phoneCtx)");``` - seems to be working fine.

### Additional Information

* **Kamailio Version** - output of `kamailio -v`

``` version: kamailio 5.6.2 (x86_64/linux) e292ba ```

* **Operating System**:

<!-- Details about the operating system, the type: Linux (e.g.,: Debian 8.4, Ubuntu 16.04, CentOS 7.1, ...), MacOS, xBSD, Solaris, ...; Kernel details (output of `lsb_release -a` and `uname -a`) -->

``` CentOS 7 X64 ```