By Nathan Ridley Roy Keane has sternly probed Gary Neville on his involvement in Salford City’s revolving door of managers. The Ammies, who are currently languishing two places above the League Two relegation zone after making the play-offs last season, recently sacked former Manchester United youth coach Neil Wood and brought in Karl Robinson. In seeing his 18-month spell at Salford come to an end, Wood became their fifth managerial casualty in five-and-a-half years. Neville, who co-owns the club alongside his United Class of ’92 team-mates and Singaporean business magnate Peter Lim, has been…