Refactor cache-memcache internal functions and extract common code sections into separate functions:
Refactor cache-memcache internal functions and extract common
code sections into separate functions:

* subversion/libsvn_subr/cache-memcache.c:
  (memcache_internal_get): new function - the core part of the getters
  (memcache_get, memcache_get_partial): reduce & use new function
  (memcache_internal_set): new function - the core part of the setters
  (memcache_set): reduce & use new function

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion