Remove GFDL

Manual copies some text from the Curl docs

* Makefile.am (EXTRA_DIST): remove fdl
* bootstrap.conf: remove fdl
* doc/.gitignore: remove fdl
* doc/guile-curl.text: remove fdl
Doc clarifications

* doc/guile-curl.texi
make bytevectors depend on guile version

* configure.ac (RNRS_BYTEVECTORS): new AC const
* src/Makefile.am (curl.scm): new grep rule
* src/curl.scm.in [RNRS_BYTEVECTOR]: use new conditional
Bad varname in curl-easy-perform

* src/curl.scm.in (curl-easy-perform): modified
Bad memset in cl_easy_init

* src/func.c (cl_easy_init): modified
Fix cl_easy_perform buffer logic

* src/func.c (cl_easy_setopt, cl_easy_perform, write_callback): bad string logic
* src/type.c (_scm_from_handle, gc_free_handle): debug info
  (_scm_can_convert_to_byte_data): bad #ifdef logic
  (cl_init_type): bad size for handle smob
Distribute GNUmakefile, maint.mk

* Makefile.am
Fix local lib paths for tests

* test/Makefile.am: fix paths
* test/do_gdb: take command line arg
* test/test001_test.test: don't use useless lib2
* test/lib2.scm: removed
Include bootstrap

* bootstrap: new file
Distribute texinfo.tex

* build-aux/Makefile.am (EXTRA_DIST): modified