YAMOUSSOUKRO, Feb 20 (Reuters) - The dignitaries at Yamoussoukro's airport craned their necks to get a better view of the two soldiers fighting. This was no ordinary scuffle between bored army men. One was French, the other Ivorian and the incident highlighted the deteriorating relations between the two sides. Dug in across no-man's land, lambasted by both sides and occasionally shot at, the elite French forces are stuck in the middle of a five-month civil war in their former colony. Rebels fighting to oust President Laurent Gbagbo have long urged the troops to leave, saying the French army is all...