XKB useModMapMods, remapping Ctrl+Esc to Win and xmonad

Contents:
1. What useModMapMods in XKB interpretations means exactly?
2. Map Ctrl+Esc to Win key (Mod4) using XKB.
3. Using Ctrl+Esc as xmonad modMask.

X11 authentication and remote X clients

There is several methods of display access control, but the most used are two:
Host Access controlled by `xhost` and MIT-MAGIC-COOKIE-1 controlled by
`xauth`. Below is just what you can find in man, and may be a little more.

git filter-branch '--subdirectory-filter' preserving '--no-ff' merges.

(update2, 3/6/2013)

Well, in fact, the name is a bit misleading, because '--subdirectory-filter'
does not preserve merge commits created after fast-forward merge (with
'--no-ff' option). I think, this is because such commits are empty and do not
change any files in subdirectory (so, this is not a bug).

Anyway, i want to split subdirectory into separate project, preserving --no-ff
merge commits.

Strange behavior of git blame '-C' option.

(update1)
'git blame' 's option '-C' works strangely to me, and i'm neither able to find
anything relevent in manpage nor somewhere else.  So, here is just test
results and my speculations, which may be (completely) wrong.

icq through stunnel: enable certificate verification.

Suggested earlier (see This icq..) config for running icq
(pidgin) through stunnel is insecure! Though it provides encryption, it does
not verify certificates, because stunnel's default is 'verify=0'.

So, here is how to fix it, but for debian wheezy.