doc: update License section to switch to LGPL 2.1+
tree28ade666f4ad5acdbbc1bae7787902467f069dec
-rw-r--r-- 24390 LICENSE
-rw-r--r-- 2832 Makefile.am
-rw-r--r-- 4171 README
-rwxr-xr-x 115 autogen.sh
-rw-r--r-- 8395 configure.in
drwxr-xr-x - doc
drwxr-xr-x - example
-rwxr-xr-x 351 genversion.sh.in
drwxr-xr-x - include
drwxr-xr-x - m4
drwxr-xr-x - source
drwxr-xr-x - test