Modules: dictionary API work in progress #5: rename API for consistency.
Modules: dictionary API work in progress #5: rename API for consistency.

By using the "C" suffix for functions getting pointer/len, we can do the
same in the future for other modules APIs that need a variant with
pointer/len and that are now accepting a RedisModuleString.

PKRoma/redis,oranagra/redis,PKRoma/redis,nnog/redis,soveran/redis,charsyam/redis,yossigo/redis,pmem/redis,antirez/redis,nnog/redis,yossigo/redis,soveran/redis,ctripcorp/redis,charsyam/redis,spinlock/redis,ofirluzon/redis,neomantra/redis,antirez/redis,spinlock/redis,ofirluzon/redis,neomantra/redis,charsyam/redis,soloestoy/redis,pmem/redis,ofirluzon/redis,spinlock/redis,neomantra/redis,oranagra/redis,spinlock/redis,ctripcorp/redis,antirez/redis,oranagra/redis,pmem/redis,soveran/redis,PKRoma/redis,charsyam/redis,soloestoy/redis,soloestoy/redis,nnog/redis,ofirluzon/redis,soloestoy/redis,soloestoy/redis,pmem/redis,antirez/redis,PKRoma/redis,oranagra/redis,ctripcorp/redis,soveran/redis,PKRoma/redis,yossigo/redis,ctripcorp/redis,neomantra/redis,yossigo/redis,yossigo/redis,oranagra/redis,charsyam/redis,nnog/redis,neomantra/redis,ofirluzon/redis