Functions in Libwget may be called from other client applications as
well. They should not report that the job was done by Wget / Wget2, but
instead they should state that it was doen by libwget.
* libwget/bar.c(_bar_update): Remove reference to Wget
* libwget/list.c: Same
* libwget/cookie.c(cookie_db_save): Wget -> libwget
* libwget/error.c(wget_strerror): Same
* libwget/hpkp_db.c(hpkp_db_save): Same
* libwget/hsts.c(hsts_db_save): Same
* libwget/ocsp.c(ocsp_db_save_hosts): Same
* libwget/printf.c: Same
* libwget/ssl_gnutls.c(wget_ssl_open: Same
* libwget/tls_session.c(tls_session_db_save): Same
* include/wget/wget.h: Introduce WGET_E_IO
* libwget/error.c: Add WGET_E_IO to wget_strerror()
* libwget/hashfile.c: Make use of WGET_E_IO
* libwget/io.c: Likewise
* docs/Makefile.am: Add man page build for error functions
* include/wget/wget.h: Make WGET_E_* an enum wget_error_t,
declare new function wget_strerror()
* libwget/Makefile.am: Add error.c
* libwget/error.c: New file