src/sys/i4b/layer2, branch main

Remove ISDN4BSD (I4B) from HEAD as it is not MPSAFE and

2008-05-26T10:40:09+00:00

parts relied on the now removed NET_NEEDS_GIANT.
Most of I4B has been disconnected from the build
since July 2007 in HEAD/RELENG_7.

This is what was removed:
- configuration in /etc/isdn
- examples
- man pages
- kernel configuration
- sys/i4b (drivers, layers, include files)
- user space tools
- i4b support from ppp
- further documentation

Discussed with: rwatson, re

I4B header files were repo-copied from sys/i386/include/ to

2007-07-06T07:17:22+00:00

sys/i4b/include/ so they will be available to all architectures
once I4B compiles on those.

Adapt #include paths.

Approved by:	re (kensmith)

Fix -Wundef warnings found when compiling i386 LINT, GENERIC and

2005-12-05T11:58:35+00:00

custom kernels.

/* -> /*- for copyright notices, minor format tweaks as necessary

2005-01-06T22:18:23+00:00

Use __FBSDID().

2003-06-11T00:01:05+00:00

Fix off-by-one errors in range checks of state machine states & events.

2003-05-31T18:54:02+00:00

Found by:       FlexeLint

Fix systematic off-by-one errors in unit number range checks.

2003-05-31T16:57:01+00:00

Found by:       FlexeLint

Back out M_* changes, per decision of the TRB.

2003-02-19T05:47:46+00:00

Approved by: trb

Remove M_TRYWAIT/M_WAITOK/M_WAIT. Callers should use 0.

2003-01-21T08:56:16+00:00

Merge M_NOWAIT/M_DONTWAIT into a single flag M_NOWAIT.

Be consistent about marking functions static.

2002-10-15T20:32:45+00:00

Found by:	FlexeLint.