DNS views, part 21 (1 of 6)

Issue #26
Program: dnsaddhost

This commit provides:
- third argument (view) to dnsaddhost
- common code migration from CGI and dnsaddhost
    to libnetmagis.tcl
- translation of messages and comments
DNS views, part 21 (2 of 6)

Issue #26
Program: dnsaddalias (and dnsaddhost)

This commit provides:
- third argument (view) to dnsaddalias
- fix bug in previous commit about dbabort output
- common code migration from CGI and dnsaddalias
    to libnetmagis.tcl (add-alias procedure)
- translation of messages and comments
- reduce size of dnsaddhost by removing the unneeded
    add-ip function
- syntax-error no longer quits (call "d error" method
    instead)
- fix a long standing bug in admpar (dbabort method
    called without reference to the "d" object)
DNS views, part 21 (3 of 6)

Issue #26
Program: dnsdelhost

This commit provides:
- second argument (view) to dnsdelhost
- rework interface of the numerous del-* in
    libnetmagis.tcl
- common code migration from CGI and dnsdelhost
    to libnetmagis.tcl (add-alias procedure)
- translation of messages and comments
- reduce size of dnsdelhost by removing the unneeded
    del-host function
- syntax-error no longer quits (call "d error" method
    instead)