these methods should have been declared as const

git-svn-id: http://svn.miranda-ng.org/main/trunk@10335 1316c22d-e87f-b044-9b9b-93d7a3e3ba9c
code cleaning towards smiley drawing 

git-svn-id: http://svn.miranda-ng.org/main/trunk@10336 1316c22d-e87f-b044-9b9b-93d7a3e3ba9c
PF4_SINGLEFILEONLY - protocol can require sending files only one by one

git-svn-id: http://svn.miranda-ng.org/main/trunk@10337 1316c22d-e87f-b044-9b9b-93d7a3e3ba9c