ok kn, tracey

it was broken in 7ecc454 because now we're emitting tags with multiple `class' attributes (by mistake) and only the first one is used. However, instead of fixing the HTML `class' attribute, use a CSS selector to alternate the background colors. ok tracey@

This adds some buffering to fcgi_gen_binary_response so that we don't end up sending too many (very) small fastcgi records. While here also make fcgi_send_response non-void and make its errors "sticky". ok tracey@

HTML IDs are meant to be unique across the page. While here fix two small errors in the generated HTML (one missing closing div and one extra.) ok tracey@

Needed for -portability reasons. OK op@

Someof the socket code has been factored out of gotwebd and put centrally so that platform-specific targets can be created, without the need of heavily modifying the central socket code to contain numerous ifdefs.

I don't think this assignment to sin_len is needed at all, because sin_len is already being set via got_sockaddr_inet[6]_init() during the configuration stage. Tested successfully on both fcgi socket types (unix / tcp).

ok stsp@

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@

found by jrick

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@

ok tracey

../lib/blame.c:344:11: error: implicit declaration of function 'diff_atom_hash_update'

suggested by stsp@; no functional change.

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@

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@

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@