Merge from Mark's code. Modified memcat to use enum for options.

[m6w6/libmemcached] / src / client_options.h

typedef enum {
  OPT_SERVERS= 1,
  OPT_VERSION,
  OPT_HELP,
  OPT_VERBOSE,
  OPT_DEBUG,
  OPT_FLAG,
} memcached_options;