Fix some issues in Konversation docs
(cherry picked from commit 9de309db431c5315560e6b0da17cb5b21d06b2e4)
backport from master
Fix typo, localizable entities for 'nickname'
(cherry picked from commit 298946a8f3ca0a040b1cae2b27821c9c0fcfedcf)
backport from master
Fix 'libpng error: IDAT: invalid distance too far back' error

REVIEW:110314
Set that the user is identified after a WHOIS
Merge branch '1.5'