add option-conflict handling for 'got tag' -s and -V options

add -V option to 'got tag' usage string, and replace underscore with a hyphen

check for specific chars instead of using isspace(3) Reminded by naddy and stsp; it was missing a cast to unsigned char to prevent issues on archs with signed chars and was too broad anyway. While here, drop an extra check immediately after. ok stsp@

got_date.h: add explicit #includes Don't rely on implicit/"hidden" includes, but rather add them to the header file so their inclusion doesn't result in missing values. Although not explicitly a functional change, this does help -portable. This ensures size_t/time_t are always present. OK @jrick

remove duplicate test_parseargs call spotted by op@

fix echo/printf order and actually run the test

Use pipe() which is a more understood syscall than pipe2() which doesn't exist on MacOS, for instance. Since we we're passing in 0 to pipe2(), this mean no fcntl() flags were being sent. As such, it's the same syscall as pipe() which also has the added benefit that it's more portable. committing on behalf of thomas with my ok

whitespace fix

fix tag signing when the key file does not exist This should fail without creating any tag. Before, ssh-keygen(1) would print an error to stderr, but got would create an unsigned tag. ok op@

tog man page: provide a hint about differences between Myers and Patience

rename got.conf(5) mirror-references to mirror_references for consistency Existing configuration files will keep working for now since the old name with dashes is still recognized by the config parser.

rename got.conf(5) fetch-all-branches to fetch_all_branches for consistency Existing configuration files will keep working for now since the old name with dashes is still recognized by the config parser.

tog: add C-g/backspace key map to abort compound cmds Problem reported by stsp: 9999j would tie up tog till completed. While here, trim trailing whitespace in tog.1 and make C-g alias existing backspace abort key map for search and G in log view. ok op@ and stsp@

tog: expand horizontal split support to all views With this, hsplits are now available to the same parent/child view combinations as vsplits. Includes OB1 log truncation fix from op@ that was reported by stsp. ok stsp@

create and verify tags signed by SSH keys This adds a new -s flag to 'got tag' that specifies the signer identity (for example, a key file) of the tagger. The tag object will include a signature that validates each of the tag object headers and the tag message. Verifying these signed tags requires maintaining an allowed signers file which maps signer identities (i.e. the email address of the tagger) to SSH public keys. See ssh-keygen(1) for more details of the allowed signers file. After creating this file and providing the path to it in got.conf(5) using the allowed_signers option, tags may be verified using with 'got tag -V tag_name'. The return code will be non-zero if a signature fails to verify. ok stsp@

fix imsg_add TREE_ENTRY: Result too large on i386 There's a math error when computing the size of one entries in the batching code. Reported by semarie, ok semarie stsp

fix leftovers from long -> int change when changing the line addresses to be int from long the report callaback was forgotten.

got patch: handle mangled whitespaces This makes 'got patch' try to ignore whitespaces when trying to match a hunk. Discused with and ok stsp@

got patch: don't loose the x bit when merging with diff3 This fixes a regression introduced with the diff3 merge: files merged this way have their permissions resetted after patch. The issue is due the fact that patch_file looks at a temporary files and not at the original "old file". Reported by and ok stsp@

aesthetic: rename regress to test_patch_rm_file drop the "simple" part, there's no "complex" way of removing files.

augment test_patch_add_line Try to create a file with more than one line, it would have catched an issue with my wip diff for ignore whitespaces in got patch. While here rename the function to drop "simple".

refactor the patch parser Introduce a patch_start routine that finds the next "diff" header (if there is one); the idea is to persist some state (commit id and wether it's a "git diff") while processing the content of the diff. It's needed because in the case of 'got diff' some information like the commit id are only present once at the beginning. As a consequence, the patch parser becomes slightly more robust (concatenating diffs produced by different means shouldn't confuse it anymore) and drops the support for "old" got diffs, the ones previous the introduction of the "commit -/+" header. ok tracey@

tog: remove count prefix timeout and bold output Suggested by naddy. block till non-numeric input is entered, and don't echo in bold. ok naddy@ op@ and stsp@

unconditionally set x/y pointers in view_get_split() suggested by and ok op@

make the diff algorithm used by 'tog diff' and 'tog blame' configurable ok jamsek