#8 Listening Port Range

[Leon Kos]

This patch overcomes often blacklisted standard port
range 6881-6889 to user specified port range through
(optional) environment variables BTLIB_MINPORT and
BTLIB_MAXPORT.

Example of such usage for bourne shell:

BTLIB_MINPORT=56881
export BTLIB_MINPORT
BTLIB_MAXPORT=56889
export BTLIB_MAXPORT

Function interface in context.c is not changed! So this
is harmless patch for 1.05 release.

[Leon Kos]

context.c patch for listening port range