This patches add compatibility for the forthcoming RobotFramework 5.

Taken from: https://github.com/robotframework/SSHLibrary/pull/403.
diff --git a/src/SSHLibrary/pythonforward.py b/src/SSHLibrary/pythonforward.py
index 8b85997b7..607985cf4 100644
--- a/src/SSHLibrary/pythonforward.py
+++ b/src/SSHLibrary/pythonforward.py
@@ -1,9 +1,9 @@
 import select
 import socket
 import threading
-from robot.utils import platform
+from robot.utils import PY2, WINDOWS
 from .logger import logger
-if platform.PY2 and platform.WINDOWS:
+if PY2 and WINDOWS:
     import win_inet_pton
 try:
     import SocketServer
3b309c84a6838fb'/><select name='h' onchange='this.form.submit();'>
<option value='koszko' selected='selected'>koszko</option>
<option value='koszko-scripts'>koszko-scripts</option>
</select> <input type='submit' value='switch'/></form></td></tr>
<tr><td class='sub'>Wojtek's customized Guix</td><td class='sub right'></td></tr></table>
<table class='tabs'><tr><td>
<a href='/guix/about/'>about</a><a href='/guix/'>summary</a><a href='/guix/refs/?id=c9d2cf0fa595487575a1acacd3b309c84a6838fb'>refs</a><a class='active' href='/guix/log/gnu/packages.scm'>log</a><a href='/guix/tree/gnu/packages.scm?id=c9d2cf0fa595487575a1acacd3b309c84a6838fb'>tree</a><a href='/guix/commit/gnu/packages.scm?id=c9d2cf0fa595487575a1acacd3b309c84a6838fb'>commit</a><a href='/guix/diff/gnu/packages.scm?id=c9d2cf0fa595487575a1acacd3b309c84a6838fb'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/gnu/packages.scm'>
<input type='hidden' name='id' value='c9d2cf0fa595487575a1acacd3b309c84a6838fb'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/guix/log/?id=c9d2cf0fa595487575a1acacd3b309c84a6838fb'>root</a>/<a href='/guix/log/gnu?id=c9d2cf0fa595487575a1acacd3b309c84a6838fb'>gnu</a>/<a href='/guix/log/gnu/packages.scm?id=c9d2cf0fa595487575a1acacd3b309c84a6838fb'>packages.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/packages.scm?id=c9d2cf0fa595487575a1acacd3b309c84a6838fb&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2023-01-25 18:14:42 +0100'>2023-01-25</span></td><td><a href='/guix/commit/gnu/packages.scm?id=8b2721de6af76780611fe9f86fa5d4cd062400d1'>packages: Adjust 'generate-package-cache' for Guile 3.0.9.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages.scm (generate-package-cache): Adjust for Guile 3.0.9.
</span></span></td><td>Ludovic Courtès</td></tr>