Issue 3350 HttpMessage correct queryEquals method
Issue 3350 HttpMessage correct queryEquals method

`queryEquals` correct comparison and add JavaDoc.
`equalType` update JavaDoc.

Addresses zaproxy/zaproxy#3350
gmaran23/zaproxy,zapbot/zaproxy,zapbot/zaproxy,gmaran23/zaproxy,zapbot/zaproxy,Ali-Razmjoo/zaproxy,meitar/zaproxy,kingthorin/zaproxy,gsavastano/zaproxy,thc202/zaproxy,gmaran23/zaproxy,meitar/zaproxy,gmaran23/zaproxy,zapbot/zaproxy,psiinon/zaproxy,thc202/zaproxy,Ali-Razmjoo/zaproxy,thc202/zaproxy,zapbot/zaproxy,Ali-Razmjoo/zaproxy,kingthorin/zaproxy,psiinon/zaproxy,gmaran23/zaproxy,zaproxy/zaproxy,kingthorin/zaproxy,psiinon/zaproxy,psiinon/zaproxy,gsavastano/zaproxy,kingthorin/zaproxy,gsavastano/zaproxy,Ali-Razmjoo/zaproxy,meitar/zaproxy,gmaran23/zaproxy,meitar/zaproxy,Ali-Razmjoo/zaproxy,Ali-Razmjoo/zaproxy,zaproxy/zaproxy,psiinon/zaproxy,zapbot/zaproxy,Ali-Razmjoo/zaproxy,meitar/zaproxy,zaproxy/zaproxy,zaproxy/zaproxy,gsavastano/zaproxy,psiinon/zaproxy,gsavastano/zaproxy,thc202/zaproxy,thc202/zaproxy,zaproxy/zaproxy,thc202/zaproxy,meitar/zaproxy,kingthorin/zaproxy,kingthorin/zaproxy,meitar/zaproxy,kingthorin/zaproxy,meitar/zaproxy,gsavastano/zaproxy,thc202/zaproxy,zapbot/zaproxy,psiinon/zaproxy,zaproxy/zaproxy,gmaran23/zaproxy,zaproxy/zaproxy,gsavastano/zaproxy