databases/cego: 2.48.10 -> 2.48.14

• Fix added in CegoObjectManager::alterObject, after freeing old page entry, page should be unfixed with marked as dirty. In the main loop, unfix has been changed to dirty = false
• Added function dateformat which can be feeded with two expressions to return a datetime value from a given format and value string ( analog to date(x,y) which expects constant input values )
• Added more date functions to the datefunc package. Now there are the following date functions available int second(datetime d) int minute(datetime d) int hour(datetime d) int day(datetime d) int month(datetime d) int year(datetime d) datetime plusHour(datetime d, int hr) datetime plusDay(datetime d, int dy) datetime plusMonth(datetime d, int mt) datetime plusYear(datetime d, int yr) datetime minusHour(datetime d, int hr) datetime minusDay(datetime d, int dy) datetime minusMonth(datetime d, int mt) datetime minusYear(datetime d, int yr)
• In CegoMain, added DEFAULTDATETIMEFORMAT1 to dateFormat list to also parse this format for native cast from string to datetime
• Added Query Cache menu to CegoAdmScreen to manage query cache parameters