tog: drop regex for line types to colour the diff view ok stsp@

avoid allocating too many errors in cmd_info got_error_path uses get_custom_err to get a statically allocated error allocated on a buffer that's used a ring. This is nice and simple, but the drawback is that thees custom errors shouldn't be used "for too long" because they might get overwritten later. cmd_info is one offender: change it to store a "simple" error and later re-use it to construct the per-path error. OK and tweaks stsp@

add some TODO items for gotwebd

tweak tag_test_create to detect the issue fixed in previous commit

fix "got tag" not tagging the work tree's current branch by default found by jrick

tog: keymaps to jump to next/prev file/hunk in the diff Add () and {} key maps to navigate to the previous and next file or hunk in the diff. This required changing Got's diff API to collect line type metadata in addition to the line offsets already produced as prompted by stsp. ok stsp@

sync files from diff.git 9343b92549173e00690f24756a633423770f56d7

make gotwebd start up without a config file ok tracey

revert previous commit to sync with diff.git changes; it broke the build ../lib/blame.c:344:11: error: implicit declaration of function 'diff_atom_hash_update'

sync files from diff.git f400825bc668466d9fc593470514d6e69ddfc5ff

sync files from diff.git cd9ef01a441e0ecfd499bf907c15a2878f7e0ee2

locate_hunk: set mangled earlier for clarity suggested by stsp@; no functional change.

patch regress: unify some tests

allow for ignore whitespaces when matching the hunk

gotwebd: avoid large allocation per fcgi record while here also wrap fcgi_send_response to make sure we don't end up trying to send a fcgi record bigger than allowed. ok tracey@

sync files from diff.git 3a15e1807a369c0a7827363eca22c9f1a8598d9c Rather than realloc in fixed-sized blocks, use the 1.5 * allocated scheme when growing the array. This produces fewer allocations and up to 3x speedup on large diffs. ok stsp@

tog: add n{G,g} key map to jump to line n like less(1) Available to all views; for example, 99g will navigate to line 99 in the file if in a blame view or the 99th commit if in a log view. Includes improvements suggested by naddy and stsp. ok naddy@

remove a tog blame TODO item which has been implemented

remove 'author' TODO items; these have been implemented

add two more TODO items

move use of sin_len out of gotwebd's parse.y ok tracey

rework got patch -c documentation ok op@

remove pointless repo_close with leaked error; found by florian with scan-build

fix two missing error checks in tog; found by florian with scan-build

tweak op@ log_debug output