- remove gzopenfull() and gzdopenfull()
- un-bump minor number
- remove docs for gone functions.
traditionally this is an invalid change (removing an API from a library
without bumping the major.) it has been decided that this case is special
enough not to require that. no one should have been using these new
functions yet.
PS: this may cause "make install" to barf about older libraries already
being installed.
additional "const char *savename" and "u_int32_t mtime" parameters that
are written out into the gzip header in the mtime field and as the original
filename.