Make dbid range check for SWAPDB command consistent with SELECT, MOVE, and COPY. (#8555)
Make dbid range check for SWAPDB command consistent with SELECT, MOVE, and COPY. (#8555)

DB ID used to be parsed as a long for SWAPDB command, now
make it into an int to be consistent with other commands that parses
the DB ID argument like SELECT, MOVE, COPY. See #8085

The implication is that the error message when the provided db index
is greater than 4M changes slightly.
JackieXie168/redis,JackieXie168/redis,JackieXie168/redis,JackieXie168/redis