Update manpage for -I command.
Update manpage for -I command.

Update documentation to more accurately reflect the value
 that should be passed along as the parameter via command line.

bpzhang/memcached,dormando/memcached,rmccullagh/memcached,elfchief/memcached,elfchief/memcached,samanbarghi/memcached,samanbarghi/memcached,elfchief/memcached,rmccullagh/memcached,dormando/memcached,memcached/memcached,bpzhang/memcached,guikcd/memcached,gencer/memcached,elfchief/memcached,rmccullagh/memcached,guikcd/memcached,bpzhang/memcached,samanbarghi/memcached,guikcd/memcached,gencer/memcached,bpzhang/memcached,rmccullagh/memcached,gencer/memcached,samanbarghi/memcached,dormando/memcached,memcached/memcached,guikcd/memcached,gencer/memcached,memcached/memcached,memcached/memcached,rmccullagh/memcached,dormando/memcached,memcached/memcached,guikcd/memcached,dormando/memcached,elfchief/memcached,gencer/memcached