* libwget/netrc.c: New file for netrc API functions
* include/libwget.h: Add netrc function prototypes
* libwget/Makefile.am: Add netrc.c
* libwget/test_linking.c (main): Add call to wget_netrc_deinit()
* src/options.c: Add --netrc and --netrc-file
* src/options.h: Add config.netrc and config.netrc_file
* src/wget.c (http_get): Get login/password from netrc data
* tests/test-auth-basic.c (main): Add test for --netrc-file