improve gw_template error handling, remove gw_briefs from gotweb_ui and move to kcgihtml

revert 6b8a2b8fcd99c4365b1aa9513c0f0149beac2491; it broke 'n' (search next) In the log view, 'n' sometimes failed to search for the next matching commit and tog dead-locked. So a yield or mutex unlock/lock is required for search to work. Perhaps we need a different fix?

avoid leaking memory in gw_get_site_link()

better error checking for gw_get_repo_tags()

improved error checking for gw_get_diff()

improve error checking and memory management in gw_get_repo_tree()

fix lost gw_gen_commit_msg_header in gw_blame

make commit ID links in gotweb's blame page point to diffs rather than blobs

improve error checking in in gw_get_diff() and use getline(3) to read lines

support strings of arbitrary length in gw_html_escape(); add XXX comment

HTML-escape errors displayed by gw_display_error()

let gw_get_file_read_blob() worry about blob content; caller handles the rest

use separate functions for blaming vs. reading a blob

make gw_get_file_blame_blob() return a got_error

improve error handling, and plug some memleaks, related to repo age strings

read repository owner name with gitconfig parser instead of a hand-rolled one

improve error handling for gw_get_clone_url()

fix fread(3) error check added in previous commit

proper error handling for gw_get_repo_description()

replace improperly removed break

add missed error catching in gotweb

goto done and remove erroneous break

typo

enable searching in tog diff view ok stsp

ignore EROFS during checkout for repositories on read-only filesystems