context: merge of 80553 (impl)
context: support for Mac OS X 32 bit
context: merge from trunk (replace align_stack() by assembler; remove stack-allocator)
context: bufix (Mac OS X)
context: bugfix for 64bit Mac OS X
context: merge from trunk
context: merge from trunk
context: merge from trunk
context: merge from trunk (SPARC support)
context: revert support for SPARC
context: merge documentation from trunk
context: merge from trunk (SPARC support)
context: merge from trunk
context: add hint for make_fcontext() in docu
context: merge from trunk