slang2: import from oldpackages
sslh: import from oldpackages and fix md5
xz: import from oldpackages
mc: import from oldpackages with new version and some improvements

* support slang
* depend on bash for concurent shell
* install all supporting data
* add as options: viewer, docs, mans
bash: import from oldpackages with new version and improvements

* new version 4.3
* install as default interactive shell
* drop obsoleted by upstream patches
sshguard: inroduce with version 1.5

Integrates well with OpenWRT but fails to read uClibc syslog format :-(