Update silc to 1.1.10 in the win32 build. Refs #15286 release-2.x.y

Check for old pref existence before using it.

Gadu-Gadu: fix compilation on 64bit targets

Merge GSoC 2012 Gadu-Gadu branch

Gadu-Gadu: missing copyright notes soc.2012.gg

Gadu-Gadu: add GSoC copyright note soc.2012.gg

Gadu-Gadu: setting public profile information. Fixes #6918 soc.2012.gg

Gadu-Gadu: public directory search with gg10.5 api soc.2012.gg

Gadu-Gadu: retrieve buddy public alias after adding to blist. Fixes #2188 soc.2012.gg

Gadu-Gadu: getting user information with gg10.5 API soc.2012.gg

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