Double sieveshell and installsieve

[Дилян Палаузов]

Hello,

in the cyrus-imapd repository, in both cyrus-imapd-2.4 and master, the 
sieveshell and installsieve are presented twice:

sieveshell is in /SIEVE/scripts/sieveshell and 
/perl/sieve/scripts/sieveshell.pl

installsieve is in /installsieve/installsieve and in 
perl/sieve/scripts/installsieve.pl,

and installsieve/libinstallsieve.a and perl/sieve/lib/libisieve.a 
contain more or less the same files.

My question is, what is the intended difference between the two 
sieveshell-s, between the two installsieve-s and between 
libinstallsieve.a and libisieve.a ? In case there is not supposed to be 
any difference, can the one of the copies be removed?

Със здраве
   Дилян