bin/couchbase-server -k does not return if memcached.bin is wedged

Per our conversation with Ram Dhakne yesterday, we'd like to request an improvement that guarantees couchbase-server -k will return and that all couchbase processes will be stopped when it does.

To reproduce, send SIGSTOP to memcached.bin to emulate a wedged state and run couchbase-server -k; it will hang indefinitely.

[thendric@thendric-ld1 bin]$ pgrep memcached.bin

69978

[thendric@thendric-ld1 bin]$ kill -SIGSTOP 69978

[thendric@thendric-ld1 bin]$ time ./couchbase-server -k

^C

BREAK: (a)bort (c)ontinue (p)roc info (i)nfo (l)oaded

       (v)ersion (k)ill (D)b-tables (d)istribution

a

real	2m32.747s

user	0m0.206s

sys	0m0.075s

Desired behavior: couchbase-server -k returns after some predetermined (or specifiable via CLI args) timeout, having sent SIGKILL when required to force couchbase processes offline.